Conrad Murray doesn't regret for a second doing the documentary that infuriated Judge Michael Pastor, because he wanted the public to hear his side of the story.

Murray -- who declined to testify in his trial -- spoke with friends and family after the sentence.  We're told Murray said he knew he was going to get the maximum sentence, so it didn't bother him that he became Judge Michael Pastor's human punching bag over the things he said in the documentary -- in particular, trashing Michael Jackson and not accepting any blame for his death.

And we know more about Murray's reaction to the sentence.  He's saying he's "surprisingly upbeat" about the sentence, telling one friend, "I'm just relieved it's finally over," adding, "Don't worry, I'm fine, and I'll be out soon."

Dr. Conrad Murray's baby mama Nicole Alvarez is furious over the maximum sentence that was imposed today -- claiming Judge Pastor's decision was "ridiculous."

Nicole stepped out today with her son -- insisting Murray has beaten himself up non-stop since Michael's death ... despite Judge Pastor's claim the doctor showed no remorse for his crime.

Nicole adds, Murray has been "mournful for the past two-and-a-half years."

Conrad Murray's lawyer J. Michael Flanagan admits the decision to do a tell-all behind-the-scenes documentary was "probably a mistake" ... but tells "TMZ Live" the Doc really needed the money.

Katherine Jackson wants Conrad Murray to rot behind bars -- telling reporters outside the courthouse, the doctor's 4-year sentence is "not enough."

Speaking to KTLA ... Katherine added, "Four years won't bring my son back" -- but she admits ... Judge Michael Pastor was extremely fair with his sentencing.

Conrad Murray's defense attorney J. Michael Flanagan just stormed away from a news conference -- after he was ambushed by hecklers.

Flanagan was in the middle of making a statement, claiming, Murray "led 56 years of exemplary life" -- at which point he was interrupted by someone in the crowd ... "And then he killed Michael Jackson."

Flanagan asked for the hecklers to be removed ... but after nothing happened, Flanagan said, "I'm out of here."

Judges, prosecutors and criminal lawyers who have spoken with TMZ agree ... Conrad Murray should not get the maximum sentence -- 4 years in prison -- but the fact that he killed Michael Jackson changes everything.

It's not supposed to be this way -- the fame of the victim should be irrelevant -- but it's hard to ignore the fame of the victim.

The people we spoke with say the typical sentence for someone in a similar position -- no criminal history, an otherwise unblemished record -- would be a "blended sentence" -- a year or 2 in jail, and then a year or 2 of community service. 

Judge Michael Pastor made it clear when he denied Murray bail -- he views the crime as extremely serious, possibly telegraphing a maximum sentence.  It's hard to tell what Pastor will do, but almost everyone considers him a fair but stern judge.

The fact that the D.A. is asking for $100 million in restitution shows how much of a difference it makes that MJ is the victim.  The reality is  -- in terms of money -- Michael is worth more dead than alive, so there should be no restitution.  His 3 kids will now get hundreds of millions in a windfall.

Katherine, Jermaine, and Rebbie Jackson just arrived at the L.A. County Courthouse -- moments before Dr. Conrad Murray is scheduled to be sentenced.

La Toya Jackson just showed up with Kathy Hilton ... Randy Jackson rolled up minutes later.

So far, no sign of Joe.

English was not the only language used in the jury deliberation room in Conrad Murray's case ... this according to a relative of one of the jurors ... and there may have been a language barrier in the juror room.

We're told at least 2 of the jurors began discussing the case in Spanish during the 8-hour deliberation. 

A relative of one juror -- we'll call him juror A -- tells TMZ ... another juror -- juror B -- had "some trouble" understanding some of the testimony.  During the deliberations juror A had to translate the testimony into Spanish to juror B.

In the questionnaire jurors were required to fill out, the first question read, "Do you have any difficulty reading, speaking or understanding English." 


A spokesperson for the court tells TMZ ... no juror ever requested a court-appointed translator at any time during the trial or deliberations.

A juror in the Conrad Murray trial tells TMZ ... the decision to find Murray guilty of involuntary manslaughter was not difficult, and jurors were all in agreement early on in the deliberation process.

The juror -- who asked not to be identified -- tells us jurors were not conflicted and that "it was a concrete decision." 

The juror also said the jurors were unified early on ... long before they ended their 8-plus hours of deliberations.

As for what swayed the jury, the juror did not want to speak for the others but said it was the totality of the evidence.  We asked if Murray's 2-hour interview with LAPD detectives was a turning point, but the juror said it wasn't.   The juror said the body of evidence -- not one individual item -- was just overwhelming.

The juror is "glad it's over" and is happy to return to "normal life."

He's barely been locked up a couple hours -- but TMZ has learned, Dr. Conrad Murray has already been offered a delicious sacked lunch behind bars ... including jailhouse-baked cookies.

Law enforcement sources tell TMZ, Murray's first meal contained a cheese sandwich, some fruit punch, a few carrot sticks, and some homemade Oreo-knockoff cookies ... baked in the jail's own bakery.

No word on whether Murray actually ate any of it, but we're guessing he didn't have much of an appetite.

The LAPD couldn't be happier with today's guilty verdict in the Conrad Murray manslaughter trial -- telling TMZ, the verdict represents a "victory " in the eyes of law enforcement.

A rep for the LAPD issued the statement -- claiming, the department "applauded" the jury's verdict.

According to the rep, "Today's verdict of guilty is confirmation that the combined efforts of our investigators, criminalists, Coroner investigators and the District Attorney's Office were sound."

The rep adds, "The investigators have worked diligently on this case and were confident throughout the process that the investigation supported the allegation of involuntary manslaughter."