Robert Paul Cantrell, 49, was found by staff at the Montgomery County Jail early on Tuesday, July 23. He was hanged in an apparent suicide. Staff tried to revive him and perform CPR, but all life-saving attempts were unsuccessful.
Two other men, Eric Black and Larry Woodruffe, are charged with capital murder for the Dec. 30, 2018, shooting death of the 7-year-old.
Cantrell's cause of death is under investigation and is pending autopsy/toxicology reports.