O’FALLON, Mo. • Officers called to a reported burglary in progress in O’Fallon Tuesday found a man shot to death by a female resident at a home owned by Pamela Hupp, a central figure in a high-profile Lincoln County murder case.

Police said officers were dispatched about 12:10 p.m. to a home in the 1200 block of Little Brave Drive. In a news release, police said a woman living there “had a confrontation with a male subject inside the house” and that it appeared that the woman had shot the man, who was dead at the scene.

Police Chief Roy Joachimstaler said Tuesday evening that police got two calls, first that a burglary was in progress and then that a person had been shot.

Joachimstaler said police had not determined the identity of the dead man, who he said appeared to be in his 30s.

He would not identify the shooter or comment on whether Hupp was involved.

“I just don’t want to jeopardize a case that could be going into court,” Joachimstaler told reporters outside the home.

He said the woman who shot the man is cooperating with investigators.

The woman said she was in her car in her driveway when the man, whom she did not know, approached her, the chief said.