Years before sheriff’s deputy Sean Grayson gunned down Sonya Massey in her own home, he had been discharged from the Army for serious misconduct and had a history of driving under the influence, records show.

He also failed to obey a command while working for another sheriff’s office in Illinois and was told he needed “high stress decision making classes,” the agency’s documents reveal.

Grayson, who was a Sangamon County sheriff’s deputy before he was fired and charged with murder, responded to a report of a prowler at Massey’s home July 6. Bodycam footage from another deputy showed Massey saying she rebuked Grayson, and Grayson responded by threatening the 36-year-old. The exchange ended with Grayson shooting Massey and failing to render aid.