A couple came home Thursday afternoon and saw an irate man in front of the house holding a knife, police said.
He threatened to kill the woman and her husband and told them he "didn't care about going to prison," said Brooksville Police Chief George Turner.
The suspect, Gregory L. Smith, fled before police arrived, but was arrested later that day in the area of Ellington Street, according to a media release.
Smith, 39, of 721 Hazel Ave., was charged with aggravated assault with a deadly weapon.
Smith's 23-year-old live-in girlfriend called the authorities, said Turner.
The couple Smith threatened was his girlfriend's mother and stepfather, according to police. All four live in the same house and Smith had argued with his girlfriend earlier that day and was still fuming by the time her family came home, Turner said.
Smith was transported to the Hernando County Jail and held without bond.
Also on Thursday, deputies with the Hernando County Sheriff's Office made their own felony arrest related to a domestic case.
Anthony Thomas Lagala, 25, of 14286 Action St. in Brooksville, was accused of shoving his wife against a wall, bloodying her lip and choking her.
The couple had been arguing about photographs Lagala's wife had discovered on his cell phone, according to an arrest affidavit.
Deputies arrested Lagala at his house shortly after 11:50 p.m. and took him to jail, where he was held without bond.
Deputies arrested another domestic suspect around the same time about 13 miles away in Spring Hill.
Raymond Douglas DeForest, 54, of 1489 Coachman Road, was accused of waking up his wife, pulling her out of bed by the ankles and pulling her hair.
DeForest's wife fled the house and was found by deputies walking through the neighborhood, according to the sheriff's office.
Deputies said the accuser had bruises around her ankles and her hair appeared to have been pulled.
DeForest was arrested and taken to jail shortly after midnight. He was charged with misdemeanor domestic battery.