New details continue to emerge about a workplace shooting in western Kentucky, where a man killed five people at a plastics plant, before turning the gun on himself.
The girlfriend of the shooter, Wesley Higdon, is speaking out about him. He spoke to her just moments before opening fire at the Henderson plant.
Police say 25-year-old Higdon had a minor criminal record, including a DUI conviction, and a conviction for marijuana possession, before Wednesday's shooting.
His boss at Atlantis Plastic in Henderson says Higdon had only been disciplined once, for a minor on the job infraction.
Investigators say Higdon had an argument late Tuesday night with his supervisor about wearing safety goggles and using his cell phone on the line before the shooting happened.
Police say he then called his girlfriend and told her he wanted to kill his boss.
While his girlfriend says he has made threats in the past, she says this time it was himself, and not his supervisor, Higdon threatened to kill on the phone.
Police are now looking into whether Higdon's girlfriend should face charges for failing to notify police about the phone call he made to her.
As the investigation continues, workers returned to the plant Thursday morning. It was their first full day back since the shooting.
The woman who survived the shooting is still in an Indiana hospital, but we're told her condition is improving.