CELEBRITY JUSTICE ™

Caitlyn Jenner's medications may have triggered her fatal car crash ... so claim the stepchildren of the woman killed in the accident.

The 2 stepkids filed legal docs in which they demand to know the meds Caitlyn was taking, saying they may have contributed to her ability to drive.

As for what type of meds ... all we know is that Jenner was tested after the accident and authorities determined she was not impaired at the time of the crash.

According to the legal docs, obtained by TMZ, Caitlyn has already taken the deposition of a paparazzo who was at the scene of the PCH crash, to determine if the photog caused or contributed to the crash.

Sources tell TMZ, Jenner has said she was being chased at the time of the crash.

Nikki Mudarris is accusing her ex BF Mally Mall of not only leaking their sex tape ... but also hitting her, destroying her property, and threatening to blackmail her.

The "Love and Hip Hop: Hollywood" star says Mally is obsessed with her and told her he would "EXPOSE UR DIRTY P" if she didn't stop being a bitch. She says a week later, he leaked a sex tape they had made.

Mudarris makes the accusations in her request for a restraining order against Mally Mall. In the docs, she also says he's threatened to kill himself. As for violence against her ... Mudarris says Mally injured her nose back in February, and has destroyed her phones multiple times.

Nikki seems to fear Mally's exotic pets, because when asked about any weapons he might own -- she points out his collection of wild animals and snakes.

Mudarris says Mally's been hitting her up for money, and believes he's recorded other sexual encounters without her knowledge to blackmail her. In other words -- don't be shocked if another sex tape leaks.

A judge granted the restraining order ... which requires Mally Mall to stay 100 yards away and have no contact with Nikki.

Last night Mally sounded like he was just as done with Nikki as she is with him.

Randy Quaid can't seem to get things right north of the border ... he was just detained in Canada and it could lead to his deportation.

Law enforcement tells TMZ Quaid was picked up in Montreal where he and his wife Evi live. It appears Evi was involved in the incident as well, she tweeted, "i love that Canada needs to learn how to wake up and criticize its crappy government ... ps we got arrested by an actual tall midget."

It's unclear why Quaid was detained but an immigration official tells TMZ he will have a detention review hearing on Thursday.

A law enforcement source in Santa Barbara -- where Quaid has several warrants out for his arrest -- tells TMZ they'll pick him up once he's brought back to the US.

Former "American Idol" contestant Corey Clark's arrest was the result of a conspiracy -- set in place by his estranged wife and her detective stepfather ... at least that's what Clark is claiming now.

Clark got busted September 23 in Yuma, AZ, and was eventually charged with misdemeanor domestic violence. But Tuesday in L.A. he told us the whole thing was a revenge plot.

Clark says he'd filed a report against Monica Clark just prior to his arrest, claiming she was violating their child custody agreement. Clark thinks it's no coincidence he was arrested right after that, especially because his wife's stepfather is a Yuma PD detective.

We've reached out to Yuma PD for a response ... so far, no word back.

"Maze Runner: The Scorch Trials" star Dylan O'Brien is getting called to the principal's office -- after he bragged about stealing Native American artifacts from the movie's set, he'll have to answer to 20th Century Fox studio execs.

O'Brien spilled the beans about jacking the stuff a couple weeks ago on "Live with Kelly & Michael" -- and did it in a pretty insensitive way ... admitting they'd been warned to leave any native artifacts they might stumble upon during filming. He said they took stuff anyway, and joked they'd been cursed because several cast members got sick.

TMZ spoke with Roch Hart, who manages Diamond Tail Ranch in Albuquerque -- where the movie was shot -- and he was pissed about O'Brien's comments. He told us he wasn't sure what, if anything, O'Brien and his co-stars really did take -- but said, "If the artifacts are not returned, we will be contacting our attorney."

Hart said he called 20th Century Fox, the film's distributor, on Tuesday to see if it would offer any assistance, and a few hours later he was told Fox would reach out to the cast and crew. Hart says he's been told the studio will find out if anything was taken, and if so ... make it right.

Leave things where you find them, kids!

Oakland Raiders superstar Aldon Smith is fighting the charges in his DUI case -- pleading not guilty to allegations he smashed his SUV door into another car and then drunkenly drove from the scene.

Aldon was arrested on August 6th -- after cops say he tried to get out of his car in a lot about a mile from Levi's Stadium when he swung the door open into the car next to him, causing roughly $500 in damage.

Cops say Smith got back in his car and left ... only to return to the scene on foot, where cops were waiting. Aldon then bombed a sobriety test and was arrested for DUI, hit and run and vandalism.

If convicted, Smith -- who has been arrested for DUI twice -- faces up to 2-and-a-half years behind bars.

Bill Cosby was just sued by the woman who has triggered an active criminal investigation against the comedian.

Chloe Goins -- who says she met Cosby at the Playboy Mansion in 2008 where she allegedly was given a date rape drug -- outlines in the lawsuit, obtained by TMZ, the claims 40 other women have made and then says, "The nature of these activities establishes a history of a serial rapist that has been conducting these horrendous activities against women for over the last 40 years."

She says she woke up naked in a room with Cosby who was at the end of the bed biting one of her toes. Goins claims Cosby quickly left the room when he noticed she was awake.

The case is now under review by the LA District Attorney.

Chloe is asking for more than $75,000 in damages.

"Vanderpump Rules" star Jax Taylor is looking to wipe the smile right off of a teeth whitening company's corporate face ... claiming his pearly whites have been jaxed.

Taylor filed legal docs claiming he had a deal in 2009 with Lumibrite to pose for ads for its teeth whitening product. He says the deal ended a long time ago, but the company's kept using his mug.

This is Jax's second lawsuit in a month ... he sued a shoe company in September for another endorsement deal gone wrong.

We reached out to Lumibrite for comment ... so far, no word back.

Nick Gordon says Bobbi Kristina's family is painting him as a murderer and scumbag to the point he will never get a fair trial if he's criminally prosecuted.

Gordon says in legal docs -- obtained by TMZ -- the Brown family has painted him a "murderer, a habitual batterer of women, a seducer of young white females, a thief and/or con man fueled by monetary gain, and a chemist capable of making a toxic cocktail."

Gordon is asking the judge to stop the $40 million wrongful death lawsuit the Browns filed against him until the criminal process runs its course.

The big thing for Gordon ... he says he has a right to remain silent, and the civil case would force him to answer questions that could be used against him if criminal charges are filed.

"Millionaire Matchmaker" client Michael Bernback, the guy accused of raping three women, says they all wanted it and one of the women even let him pee in her mouth.

Bernback says in legal docs, obtained by TMZ, he met all three women on sexual hook-up websites. He claims at least two of the women knew they'd be engaging in bondage and/or anal sex -- a totally different story than what his eight felony and three misdemeanor charges indicate.

During one encounter, Bernback says one of the women allowed herself to be tied up with various bondage devices and let Bernback "urinate into her mouth" in the shower.

According to the legal docs, the woman all admitted they advertised on sexual hook-up websites they were looking for sexual liaisons. The docs say at least 1 of the women told cops she knew there would be multiple women on hand for a sexual encounter.

The 'Jerry Springer' producer whose sister died in their garage is now in the hot seat with the LAPD, because TMZ has learned cops believe her story about the death doesn't make sense.

Jill Blackstone's sister Wendy died in March from a combination of carbon monoxide poisoning and Xanax. At the time it appeared Wendy, who was blind and partially deaf, committed suicide ... even leaving a note.

Jill had said she had no idea Wendy wanted to kill herself. As for how a Weber grill and charcoal got into the garage, Jill told police the Weber grill was for warmth and the coals in the trash can were for roasting marshmallows.

But we've learned cops now paint a very different picture of what they say happened. Our law enforcement sources tell us when they first interviewed Jill she told cops she had no idea her sister wanted to kill herself. But cops say it's very clear Jill -- not Wendy -- wrote the "suicide" note.

Our sources say cops are "confident" Jill assisted her sister -- not out of vengeance but mercy for her condition. Even if Jill's motive was mercy-based, it would still be a crime, and we're told the case is now "on the front burner" for possible criminal prosecution.

Missy Elliott was set to perform 2 concerts in Brazil ... but never did put her game down, flip it, OR reverse it -- because she failed to promote the concerts, so now she's getting sued.

According to the suit, Missy skipped a scheduled national TV appearance on Brazil's Rede Globo. Missy was supposed to appear in November 2012 to pump up 2 shows set to go down later that month in Rio and Porto Alegre.

Jean Faustin, who booked Missy for the concerts, says her no-show screwed up ticket sales ... so he had to cancel the gigs. He says he'd already paid her a $75,000 deposit to perform -- so, he wants that amount back, plus interest.

Lorenzo Lamas hopes his son can pull through his legal troubles -- he got busted for theft at a Target -- but dad's hardly jumping through hoops to save A.J. Lamas' bacon.

We asked Lorenzo about A.J.'s theft, battery, and child endangerment arrest. He was also allegedly carrying a meth pipe. L.L. sounded concerned about his son, telling us ... "He's in a difficult spot. My heart and prayers go out to him."

But Lorenzo also hinted A.J. has burned him in the past -- "My family has been there for him on numerous occasions."

Watch the clip ... 2 words come to mind: tough love.

Drake, Nicki Minaj and Tyga say they got screwed by Birdman just like Lil Wayne did ... at least that's what Lil Wayne claims in new legal docs.

Lil Wayne now claims in his bitter lawsuit against Birdman and Cash Money, he has letters from Drake and Tyga's people claiming they got stiffed out of a fortune. And Nicki's people say in a separate letter her producers also got shortchanged by Young Money, and Wayne says it's Cash Money's responsibility to pay producers.

As you know, Lil Wayne runs Young Money, whose stable of artists include Drake, Nicki and Tyga. Cash Money is the parent company of Young Money, and Birdman is the big boss.

The allegations of Cash Money's financial shenanigans are massive. Young Money claims it was supposed to get a big chunk of a $100 million advance from Universal -- an advance that went directly to Cash Money -- and they're still waiting.

But Cash Money says Wayne and company are full of it. They gave him a $20 million advance for Young Money in 2012, another $12 million for Wayne's solo album and another $70 million in advances, royalties, marketing and recording costs for various Young Money artists.

"Baywatch" star Jeremy Jackson is in big legal trouble yet again -- accused of stabbing a woman, his 2nd such arrest this year.

Law enforcement sources tell TMZ ... Jackson got into an argument in August ... with a woman near her L.A home, and at some point he flipped out and stabbed her. We're told he fled the scene, but cops picked him up later at a hotel.

The alleged victim says JJ stabbed her in the back, arm and leg. She claims Jeremy tried to jack her boyfriend's car -- and when she tried to stop him he started stabbing.

Jackson's been charged with assault with a deadly weapon and criminal threats -- both felonies, and could be looking at up to 7 years in prison.

"Fast N' Loud" host Richard Rawlings says he broke his back promoting a famous auto parts store and all he got was the shaft.

Rich says in a new lawsuit, he signed on with the company that does marketing for O'Reilly Auto Parts to make personal appearances and sing the virtues of O'Reilly on social media sites. Rich also owns a car shop and agreed to slap O'Reilly banners on the walls.

In return for his good work, Rich says he was promised a cool $100k.

Rich says he's been shorted by $40k and is now suing for payment.

We reached out to a rep for the marketing company. So far ... no word back. Oh!!!