John Thompson, 55, who spent 14 years on death row in Louisiana before being exonerated in a murder case that brought national attention to prosecutorial misconduct, died Tuesday at a hospital in New Orleans.
The cause was a heart attack, said Emily Maw, the director of Innocence Project New Orleans.
Thompson was a 22-year-old self-described "small-time weed dealer" in 1985, when his legal nightmare began.
That January, he was arrested, after authorities received a tip, for the murder weeks earlier of Ray Liuzza Jr., a New Orleans hotelier. Thompson was then identified as the alleged assailant in an unrelated earlier carjacking.
Prosecutors put him on trial first for the carjacking, winning a conviction in April 1985. The next month, he was convicted in the murder case.
In large part because of the prior carjacking conviction, prosecutors successfully argued Thompson should receive the death penalty.
During the yearslong legal drama that followed — a time Thompson spent in an isolation cell 23 hours a day — a raft of evidentiary problems emerged.
At the murder trial, a co-defendant blamed the crime on Thompson, who had in his possession Liuzza's ring and the gun used in the killing. Thompson's legal team made the strategic call that he not testify, to avoid possible cross-examination about the carjacking conviction.