An inmate at the Marion County Jail died Monday in what appears to be a suicide, the Marion County Sheriff's Office said.

Michael Aston, 43, was found unresponsive and not breathing by jail staff at 9:47 p.m. Monday. Deputies initiated CPR, a spokesperson for the sheriff's office said, and called for both on-site medical staff and Indianapolis Emergency Medical Services.

Emergency workers pronounced Aston deceased at 10:09 p.m. "Preliminary information, which is subject to investigation, suggests that the death was a suicide by hanging," the spokesperson said in a prepared statement sent Tuesday.

Aston was not housed in the suicide housing unit because he didn't show signs of suicidal ideations, according to the spokesperson, who said at the time of his death Aston was experiencing substance abuse withdrawal.
The death is being investigated by Indianapolis police and the sheriff's office in what the spokesperson said is "standard procedure." The Marion County Coroner's Office will determine the cause of death.
ston had been in custody since July 18 in what was his 18th detention in the Marion County Jail system since 2004.

Call IndyStar courts reporter Johnny Magdaleno at 317-273-3188 or email him at jmagdaleno@gannett.com. Follow him on Twitter @IndyStarJohnny