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Soledad O'Brien stopped by "TMZ Live" Monday, still reeling from the loss of her collaborator Rob Reiner and his wife Michele ... and Soledad had some choice words for Donald Trump's disparaging post about the late actor-director.

Soledad got to know Rob well while co-hosting the 10-part true-crime podcast series, "Who Killed JFK?"

She tells TMZ, Rob was kind to everyone ... "The person who was taking in the audio, the person who was shooting, the person who was producing, the person who was helping the person who was producing, the assistants ... absolutely the kindest human being."

In fact, Soledad described Rob and his wife as "two really wonderful, kind people," making their gruesome deaths all the more heartbreaking.

"It's so horrific," Soledad said. "I honestly cannot believe it."

Rob Reiner, his wife Michele, and their son Nick attended Conan O'Brien's Christmas party Saturday night. At the party, Rob and Nick got into a "very loud argument," loud enough for many others to hear ... Reiner family sources tell TMZ. We're told Rob and Michele then left the party. We do not know if Nick left as well.

TMZ is the first to report the argument between Rob and Nick before the murders.

Our family sources add … Michele had been anguishing to friends over the last few months that she and Rob were at their wits' end over Nick's mental illness and alleged substance abuse issues, and did not know what to do with their son Nick … saying, "We've tried everything."

As you know ... the legendary actor-director and his wife were found in their L.A.-area house Sunday with their throats slit. Nick was arrested Monday morning and booked for murder ... he's held on $4 million bail.

Bill Belichick continues to be the base to Jordon Hudson's flyer ... as the 73-year-old was spotted cheering on his 24-year-old girlfriend at a competition in Atlanta over the weekend.

TMZ Sports obtained photos of the couple looking happier than ever on Sunday. Belichick -- rocking a buttoned shirt and a Navy submarine hat -- was seen alongside Jordon, who was all dolled up in her cheerleading uniform.

Hudson once again suited up for Code Black ... who she competed for last month at a Cheer Extreme All-Stars event in Raleigh.

Rob Reiner and his wife Michele had their throats slit by a family member, possibly after an argument inside their Los Angeles home, leading to their tragic deaths ... TMZ has learned.

It's unclear what exactly triggered the violence, which went down Sunday afternoon in Brentwood ... but we're told one of Rob's daughters found her parents dead and told police a family member had killed them. PEOPLE reports the couple's son, Nick, was questioned in connection with the murders. Nick has since been arrested for murder.

Our sources also say the daughter told police the family member "should be a suspect" because they're "dangerous."

TMZ broke the story ... Rob and Michele suffered lacerations consistent with knife wounds, and LAPD's Robbery Homicide Division is investigating the case.

Rob Reiner -- the legendary director -- and his wife Michele Singer Reiner have died ... TMZ has learned.

As we told you ... two dead bodies were found in Rob and Michele's Brentwood home Sunday afternoon -- and law enforcement sources tell us it is the Reiners.

Our sources say the two suffered lacerations consistent with a knife. The LAPD's Robbery Homicide Division is still investigating.

Dispatch audio captures a firefighter calling for backup to the Brentwood mansion around 3:30 PM ... though it doesn't provide any further information about the circumstances in the abode.

The NFL world was stunned when the Colts signed 44-year-old QB Philip Rivers to replace an injured Daniel Jones ... and that includes the team's top wide receiver, Michael Pittman, who told TMZ Sports he was "shocked!"

While that was his first emotion, Pittman told us there was also excitement about the move, especially since Rivers was his first quarterback after entering the league in 2020 (it was PR's last season, until now, of course).

"He really taught me everything that I learned about being a pro and about routine and everything," Pittman told Babcock.

"So I feel like there is a lot of love there. I'm excited for him. He's just like, he's fired up. He still feels like the same young guy that he was in 2020 and we'll see what transpires."

Who is the NFL's Most Valuable Player?! Pro Football Hall of Famer Warren Moon is weighing in on the hottest debated question in the league!

"I think it goes from week to week, and these next three weeks are going to really decide who wins this thing, because there's no clear-cut winner right now," Moon told TMZ Sports when asked for his take on the race.

"Everybody thought Matthew Stafford two weeks ago, then he had the bad game last week. Everybody kind of put Josh Allen out of it, then all of a sudden he becomes Superman the last couple of weeks. And then Drake [Maye] has been very steady the whole season. So right now, I would think he would be my MVP candidate at this minute," Warren explained, while adding that could change after the Pats and Bills play on Sunday.

The Bills will travel to New England for a tilt against the Patriots on Sunday, and there are more than just AFC East implications on the line, according to the longtime pro.

"We'll have to see because [the Pats] play Buffalo this week. I think that's going to be a big showdown between Josh Allen and Drake Maye to see not only who wins that division, but also who wins the MVP. And the way that Josh is playing right now, he's got a chance to go back-to-back."

FYI, Maye has 23 touchdowns and 3,412 passing yards, with only 6 interceptions this season. Allen has 22 touchdowns and 3,083 passing yards, with 10 picks. Best of all, numbers-wise, is Stafford, who has thrown 35 touchdown passes on 3,354 yards, with just 4 interceptions.

Of course, Allen was the 2024 winner and is currently third when it comes to the betting odds.

Saints rookie quarterback Tyler Shough got a ringing endorsement from former All-Pro DB Tyrann Mathieu following his big upset win over the Tampa Bay Buccaneers on Sunday ... "kind words" Shough reacted to when he chatted with TMZ Sports!

We spoke with Shough -- who was with his Pro Bowl teammate Cam Jordan at a Raising Cane's event -- just a few days removed from Mathieu's declaration that ... "This city should absolutely get behind him & embrace him as QB for (the) next decade!!"

In other words, Tyrann's seen enough -- Tyler's the guy.

"Being around [Tyrann] and for a short amount of time, and everything that he's done, and especially in this state, what a great honor," Shough told us.

Detroit rapper Baby Smoove was arrested earlier this week on a number of drug charges -- but he swiftly posted bail.

Here's the deal ... Smoove -- real name Jaelin Deanta Parker -- was pulled over in Miami late Wednesday night while driving a heavily tinted yellow Lamborghini, police say in online records. When the officer from the Miami Police Department approached the posh car, they "observed a cloud of smoke ... and a strong odor of marijuana." The officer also noted a black handgun under the driver's seat, and at that point, all occupants were asked to exit the vehicle for the officer's safety.

Police say the musician and 2 passengers were swiftly arrested because they were not legally allowed to posess any firearms, and the gun was readily available for each one to grab.

Honey Boo Boo's dad is doing just fine, TMZ has learned ... following rumors he died in a tragic car accident.

And, we even have video to prove it! Check it out -- Mike Thompson says in the clip recorded Saturday he's "alive and well" ... just living life "day by day" in Georgia. Phew!

You may have seen ... there were some unsubstantiated social media rumors that he had passed away earlier this week. Honey Boo Boo -- real name Alana Thompson -- didn't feed into the chatter.

Mike shares Alana with June "Mama June" Shannon. They split in 2014 and don't have a relationship at this point. He is also estranged from Alana.

Ray J says he's boned up on RICO and even chatted with an A.I. bot … and that’s what led him to the conclusion Kim Kardashian and Kris Jenner are a couple of racketeers.

In new legal docs, obtained by TMZ, Ray J doubles down on his racketeering claims against Kim and Kris ... laying out why he believes the racketeer label fits.

For starters, Ray J says Kim and Kris conspired with Vivid to "defraud the public with their fake lawsuit" ahead of the infamous sex tape release.

In the docs, filed by attorney Howard King, Ray J claims the Kardashians committed credit card fraud against his family by racking up a $850,000 bill.

He also claims Kim and Kris "defrauded" him into signing an agreement that featured a requirement barring further mention or public reference to the sex tape ... and he says they sent their lawyers to "extort" him after he answered questions about the sex tape in a June 2024 podcast.

Ray J says ... "To me, Kim and Kris have repeatedly engaged in a criminal enterprise and racketeering activity, violating RICO over and over again. I have no doubt about that."

Alex Hall from "Selling the OC" extended the olive branch to ex-boyfriend and costar Tyler Stanaland by inviting him on her podcast ... but it turned out Tyler canceled last minute out of respect for his blossoming new relationship.

Sources familiar with the situation tell TMZ ... Alex tried to hash it out with Tyler one-on-one for all to see ... but we’re told he got cold feet at the last minute in light of his new relationship with Hannah Morrissey.

Here's the sitch ... Alex asked Tyler to be on her podcast 'Pretty Dirty’ before Season 4 of "Selling the OC" aired, and we're told her pitch to him was to sit down publicly and have a conversation about what their "relationship" entails.

Ex-NBA star Isaiah Rider is breaking his silence on his recent arrest ... telling TMZ Sports he had no idea he was violating a protective order -- because he claims he was never served!!

We broke the story earlier this week -- the 1994 Slam Dunk champion was arrested on December 4 in Arizona and charged with one count of interfering with judicial proceedings.

It all stemmed from a protective order his wife filed for in July 2025 -- his ex, Vanessa, said in the application Rider was aggressive with her and their son on numerous occasions.

Master P's next game hits close to home -- literally -- 'cause his New Orleans Privateers take on his son Mercy Miller's Houston Cougars ... and the No Limit icon already warned his squad how "dangerous" his kid is on the court!!

TMZ Sports caught up with UNO's president of basketball operations at LAX this week ... right before his college basketball squad takes on Houston, the 7th-ranked team in the nation, on Saturday.

It's a father vs. son game of sorts -- Mercy is a sophomore guard on the Cougars ... and P told his team they gotta play hard against him.

T.J. Watt's sudden lung issue freaked out a lot of people, including Steelers legend Brett "Da Beard" Keisel, who tells TMZ Sports he's hoping for a quick and full recovery so the defensive monster can return to the field ASAP!!

We spoke with the two-time Super Bowl champion this week ... shortly after Watt had surgery on his partially collapsed lung following a dry needling treatment at the Steelers' practice facility.

Watt -- former NFL Defensive Player of the Year -- will miss at least the December 15 "Monday Night Football" matchup ... and Keisel has his fingers crossed his recovery doesn't take too long, while still prioritizing his full health.

After Andy Dick's drug overdose this week provoked panicked concern among friends, he's checked himself into rehab … Dick himself tells TMZ.

Andy tells TMZ he is currently entering a rehabilitation facility in the Palm Springs, California area.

Andy was very animated on the phone with us … he's cracking jokes and it's clear he's ready to commit to clean up … he tells us he's grateful to be getting help.

Andy tells us … "Jenny Gimenez is my sister who saved me with Tim” … Tim Ryan is Jen’s husband. They’re both sober.

Jennifer was on "Celebrity Rehab" with Andy. They’ve been friends for 20 years.