The Advocate in Newark reports Hartless wasn't supposed to have weapons, but a probation officer never checked his home, where authorities later found over 60 guns.
Roughly six weeks later, Hartless entered the Pine Kirk Care Center and killed Medrano along with nurse's aide Cindy Krantz, 48, and Kirkersville Police Chief Steven Eric Disario, 36.
Authorities have found more than 60 guns at the home of an OH man who fatally shot three people, including his former girlfriend and a new police chief.
In Kirkersville, Ohio, the suspect who is now dead is accused with killed a state village police chief, and two employees from a nursing home have violent past records revealed by a court, which even shows the history of violence includes one of the now dead nurses.More news: GOP lawmaker says Trump allegations, if true, are grounds for impeachment
Inventories from the executed search warrants listed 64 firearms found in Hartless' home.
Hartless killed himself with a shotgun.
Authorities have said they're looking into the relationship between Hartless and Medrano, who had obtained civil protection orders against him in connection with domestic violence cases. He was freed on April 12. "With intense therapy, medication compliance and lifestyle changes, I am most confident we can and will overcome our struggles". A memorial service is planned Wednesday for Krantz.
According to court and police records, Hartless had stayed at Medrano's home as recently as eight days before the shooting.