Though he was restrained, David Bush, 61, is believed to have strangled himself with a cord from the wall attached to the call button, according to Jacksonville Sheriff's Office Chief Annie Smith. After being taken into custody on Friday for Possession of a Firearm by a Convicted Felon, Bush was taken to U.F. Health under the Baker Act for potentially being a danger to himself. Smith said Bush had a history of mental health and substance abuse problems, as well as a past criminal history. G4S is contracted by J.S.O. to monitor inmates in the hospital and Bush was to be checked on every 15 minutes. Smith said J.S.O. is still in the preliminary stages of their investigation and needs to monitor the security logs and interview those who were monitoring Bush. Smith said no foul play is suspected at this time.