The father of Atatiana Jefferson, the black woman who was shot and killed by a white Fort Worth police officer responding to an open door call, died on Saturday, a family spokesman said.

Ms. Jefferson’s father, Marquis Jefferson, died around 6 p.m. at the Methodist Charlton Medical Center in Dallas, where he had been since Friday night after having heart complications and cardiac arrest, the spokesman, Bruce Carter, said on Sunday.

Mr. Jefferson had been struggling with the death of his only child, Mr. Carter said.

“I can only sum it up as a broken heart,” he said. “He had to go through so much just to get through the services as a father, and continually doing good to make sure that who he was in their relationship was something he could honor.”

Ms. Jefferson was fatally shot through her bedroom window on Oct. 12 by a police officer after her neighbor, who had noticed the doors were open, called a nonemergency police line and asked officers to check on the house.

At the time of shooting, Ms. Jefferson had been up late playing video games with her 8-year-old nephew.

The officer who shot Ms. Jefferson, Aaron Y. Dean, 34, resigned from the department and was subsequently charged with murder.

Mr. Jefferson buried his daughter a little over two weeks ago following a delay in the services as a result of a family dispute.

“His body just couldn’t take what it had to endure,” Mr. Carter said.