Thomas Mesereau

In 2019, followed by the release of the documentary Leaving Neverland, Mesereau defended Jackson once again.

On August 22, 2017, comedian Bill Cosby's sexual assault retrial was postponed after it was announced that Cosby had hired Mesereau to represent him at his retrial. On April 26, 2018, a jury found Cosby guilty of felony sexual assault on all three counts. Each of the three counts carries a prison term of up to 10 years. On June 15, Cosby fired Mesereau, replacing him with attorney Joseph P. Green Jr.

On May 30, 2015, Mesereau was retained by rap mogul Marion "Suge" Knight, founder of Death Row Records. His appearance prompted the judge to reschedule a hearing on a motion by Knight to dismiss murder, attempted murder and hit-and-run charges. On January 22, 2016, however, lawyer Stephen L. Schwartz replaced Mesereau as Knight's defense lawyer. Schwartz and colleague Thaddeus Culpepper were later replaced by criminal defense attorneys Antoine D. Williams, Jamal Tooson, and Jeremy Lessem on May 9, 2016 as well.

On April 9, 2012, Thomas Mesereau and Susan Yu began jury selection in their defense of Claudia Haro, the ex-wife of Oscar-winning actor Joe Pesci. Haro was charged with conspiracy to murder and multiple counts of attempted murder. She was facing two consecutive life sentences.

In 2009, Thomas Mesereau and Susan Yu defended Joe Babajian in a high-profile mortgage fraud criminal trial in federal court in Los Angeles. Babajian had been indicted by a federal grand jury for twenty-one felony counts, including criminal conspiracy, real estate fraud, bank fraud, loan fraud, and wire fraud. Federal prosecutors claimed Babajian participated in a scheme to inflate property values and submit fraudulent loan documents and false property appraisals.

Eight individuals pleaded guilty to being part of the conspiracy prior to trial. Three individuals, including Babajian, went to trial. On August 10, 2009, the jury returned his verdict. Babajian was not convicted on a single count. The jury acquitted Babajian of thirteen counts and hung on the remaining eight counts. The other two defendants were convicted.

Thomas Arthur Mesereau Jr. is an American attorney best known for successfully defending Michael Jackson in his 2005 child molestation trial, as well as representing many other celebrities.

In 2004, Mesereau and Susan Yu were hired to replace attorneys Mark Geragos and Ben Brafman as lead trial counsel. Johnnie Cochran, who had represented Jackson during earlier molestation accusations, had recommended Mesereau to Jackson's family. In an unusual pretrial hearing, Mesereau called Santa Barbara County District Attorney Thomas Sneddon to the witness stand and examined him under oath. Mesereau and Yu were the lead trial lawyers in the case. The trial lasted from January to June 2005 and ended with Jackson acquitted of all 14 charges against him. Mesereau said that he never expected Michael Jackson to be convicted on any count, felony or misdemeanor. "I believed, and still do, that he was completely innocent of these false charges". Mesereau also cited the prosecution as a travesty of justice and one of the most mean-spirited attacks on an innocent person in legal history. Mesereau attended Jackson's funeral service and interment in 2009.

Mesereau represented former world heavyweight boxing champion Mike Tyson in a rape investigation conducted by the San Bernardino County, California District Attorney's Office in 2001. Charges were dropped.