FRANKFORT, Ky. (AP) — A parent of a Kentucky State University student has been charged with murder in an on campus shooting that killed one student and critically injured another.

Jacob Lee Bard was at the school’s campus in Frankfort on Tuesday and fired shots at the victims at a residence hall, police said in a statement.

Investigators said the shooting was isolated, but they have not publicly shared details of the circumstances or a possible motive. The shooting killed 19-year-old De’Jon Fox of Indianapolis. A second student who was shot remains in critical condition, but his name has not been released, police said.

Bard, 48, was booked into jail on murder and first-degree assault charges. Police said Bard is from Evansville, Indiana.

Bard is being represented by a public defender at the Franklin County Department of Public Advocacy, which declined to talk about his case Wednesday.

University police officers were near the scene of the altercation that ended with the shooting and immediately arrested Bard, police said.

Investigators have watched video taken by others at the scene and surveillance footage.

Asked by reporters about alleged videos showing a fight involving Bard’s sons preceded the shooting or whether Bard might have come to campus to talk to administrators about his sons’ safety, Frankfort Assistant Police Chief Scott Tracy refused to say what may have led to the shooting.

“It’s really too early in the investigation right now to really give any details that led up to it. A lot of it would be speculation,” Tracy said Wednesday.