A Coroner’s investigation report shows Friday that convicted kidnapper and rapist Ariel Castro committed suicide in prison by hanging himself with a sheet attached to a window hinge on Sept. 3.

Castro, 53, pleaded guilty to almost 1,000 counts of aggravated murder, kidnapping, and rape, among other charges. He imprisoned three women in his Cleveland, Ohio home in horrible conditions for almost a decade before one of the women escaped on May 6. During their imprisonment, Castro continuously raped and beat them, and even beat one woman to force a miscarriage. He also fathered a child with one of the victims.

According to Associated Press, one page with bible verses written on it and one page with the names of Castro’s children and grandchildren written on it, along with a Bible open to the book of John, were found in his cell after his death.

Castro was pronounced dead at 10:52 p.m. at the hospital after being found in his cell at about 9:20 p.m. Castro was only four weeks into his life sentence.

“This man couldn't take, for even a month, a small portion of what he had dished out for more than a decade,” Cuyahoga County prosecutor Tim McGinty said, LA Times reports.