Ariel Castro, who kept three women captive at his Cleveland home, should not have been taken off suicide watch in June before his conviction, his lawyer has said.
A post-mortem examination found Ariel Castro, 53, hanged himself in his cell, a month after being sentenced to life in jail.
“There’s still an obligation to prevent our inmates from committing suicide,” Ariel Castro’s lawyer Craig Weintraub said.
Ariel Castro held Michelle Knight, Gina DeJesus and Amanda Berry in chains at his Cleveland home for about a decade until May. He raped them repeatedly.
During his trial, Ariel Castro was taken off suicide watch after authorities determined he was not at risk of taking his own life.
On July 26, Ariel Castro pleaded guilty to over 900 separate charges, in a deal that protected him from the death penalty.
Ariel Castro was sentenced on August 1 to life imprisonment without parole plus 1,000 years.
He hanged himself on September 3 in his isolation cell in Orient, Ohio.
The prosecutor who tried Ariel Castro called him a “coward” unable to withstand “a small portion” of what he had inflicted.
But Craig Weintraub told Cleveland newspaper the Plain Dealer: “He’s still a human being. This is still a civilized society.”
Prison authorities denied Ariel Castro permission to receive independent mental counselling, even though he had previously contemplated suicide and was likely to suffer depression after his life sentence, Craig Weintraub told Reuters news agency.
“We were never provided any explanation” for being denied independent mental health care, he said.
“We don’t know what the rationale was, to take him off suicide watch.”
Ariel Castro was placed in protective custody because of his notoriety. His cell was checked every 30 minutes.
The Ohio Department of Rehabilitation and Correction said its mental health staff found that Ariel Castro did not need to be placed on suicide watch, which would have meant a guard checked on him every 15 minutes, AFP news agency reports.
“Our… mental health staff determined this,” said spokeswoman Ricky Seyfang.
“Suicide watch was not required for him.”
The department said it would review the death and publish findings within a month.
The former school bus driver abducted Michelle Knight, 32, Amanda Berry, 27, and Gina DeJesus, 23, from the Cleveland streets between 2002 and 2004.
The three women escaped from Ariel Castro’s home on May 6.
In an interview last month after his conviction, Ariel Castro’s lawyers said that he fit the profile of someone with a sociopathic disorder.