In 2016, during the 17th year of his 20-year prison sentence for a July 1999 double shooting, a parole board ruled it was reasonably probable Quincy Davis would not commit any more crimes.

On Monday, two years after that board granted him early release, Athens-Clarke County police say Davis threatened an ex-girlfriend at gunpoint, opened fire on her family and was killed when the woman’s father returned fire.

Authorities offered more details Tuesday in the deadly home invasion, which injured two other men. They said Davis, 44, went to a Ponderosa Drive residence about 7:30 a.m. to confront his 39-year-old ex-girlfriend as she left for work.

He put a gun to the woman’s head and forced her back inside, according to police spokesman Geof Gilland. The woman’s parents and her 22-year-old brother were at home at the time.

“After the suspect entered the home, he began firing a handgun at the family,” Gilland told AJC.com. “The father returned fire, striking the suspect.”

The woman’s brother and her father, 67, were hit in the spray of bullets. Their conditions were unknown Tuesday.

RELATED: 2 injured, 1 killed when man confronts ex-girlfriend at Athens home

Davis was out on parole for the 1999 shooting of Clara Mae Wise and her son Jessie Eugene Wise.

In November of that year, when he was 25 years old, Davis entered what's known as an Alford plea, in which a defendant maintains his innocence but acknowledges it's in his best interest to enter the plea. He was sentenced to 20 years in prison.

Court records indicate Davis was released in October 2016 after the parole board found it was not incompatible with the welfare of society and that he would likely be employed upon his release.

The Monday morning shooting is still under investigation. An autopsy will be performed to determine Davis’ cause of death.

In other news:

Home surveillance video captured a man opening fire while trying to break into a northeast Atlanta house.