JACKSONVILLE, Fla. -- A woman shot in a triple shooting in the parking garage of Baptist Medical Center late Thursday afternoon died overnight and her 11-year-old son is in serious condition.

Police said 68-year-old Jesse Prindle Jr. pulled a gun and shot Denise Farve, 49, and their 11-year-old son as they were leaving the hospital. He then shot himself and was pronounced dead at the scene.

"When I talked to her, she said, 'I'm getting the discharge papers. I will be coming right back.' And that was the last time I talked to her," said Farve's cousin, Shelia Alexander.

Farve was transported to the trauma center at Shands-Jacksonville Medical Center. She died overnight.

The boy was in serious but stable condition at Baptist. Police have not named the son, but family members identified him as Kai Prindle.

"He's not in any peril. He's going to live. He's going to be mentally, you know, messed up. You know, watching his mom be shot down by his father," said Alexander. "Everybody is having a hard time."

The shooting happened just after 5:30 p.m. in parking structure B at Baptist Medical Center on Prudential Road.

According to Jacksonville Sheriff's Office Chief Rick Graham, a man shot his son and the child's mother before fatally shooting himself in "a very obvious domestic-related incident."

Police said Prindle and the boy had lived in Jacksonville for the past two years. Farve was a resident of New Orleans.

Members of Farve's family said the couple was in the middle of a custody dispute over the boy.

Alexander told Channel 4 she became worried about her cousin's safety.

"I knew that something was wrong, but nobody listened -- and this is what happened," Alexander said. "She waited until she was 36 years old to have her one and only son. He was the joy of her life."

According to police, a nurse was wheeling the boy out of the emergency room exit near an elevator that leads to the parking garage when the boy's father pulled a gun and opened fire.

Police would not say why the boy had been hospitalized.

"As I was walking, I saw a little boy … running. He had a gunshot to his chest, I think. He was running toward another girl, telling her to help him. As I was walking, I saw a police officers setting up and a guy shot where blood was running down his face," said one witness.

"As you step out, there is blood on the floor. You can see where it drips around and heads into the parking garage. It's fresh. I could see where some of it was wet. So, apparently, and I'm just guessing, when she stepped out of the elevator, he shot her," said another witness.

Graham said no one other than those injured were in any type of danger during the shooting because the shooting happened in an area that is not heavily populated.

Baptist remained open and continued to operate as normal as detectives continued their investigation.

At 10 p.m. the parking garage where the shooting took place was reopened.

"I am extremely proud of the response of our staff, both in term of their professionalism and the comprehensive response to what occurred," said Hugh Greene, CEO of Baptist Medical Center.