A Vietnam War veteran died of a heart attack in Chicago after attempted carjackers beat him in broad daylight. 

“[The suspects] tried to steal his car. You didn’t even get his car when you took his life,” said the victim’s son-in-law, Curtis Carlton. “It was two guys preying on a senior citizen.”

Keith Cooper, 73, died Wednesday at around 12:30 p.m. in the Hyde Park area after two people demanded he give them his car while he ran errands. They then repeatedly punched him in the head, police said, as witnesses stepped in to try to stop the attack. 

CHICAGO MASS SHOOTINGS FALL JUST HOURS APART, CREATING MORNING HORROR SHOW

“I’m just in shock. I’m still in shock because this is not the way I thought my day was going to go,” said Cooper’s daughter, Kenika Carlton.

His family said his heart could not handle the trauma of the assault and he was pronounced dead at the hospital of a heart attack. 

“He was like a bonus dad. He was my father-in-law, but he was like a dad,” Curtis Carlton said. “He was the best. Keith was the best.”

Cooper died just days before his 74th birthday and leaves behind a legacy of surviving two Vietnam War combat tours while in the Marine Corps. 

CHICAGO GUN VIOLENCE LEAVES 40 SHOT, 11 KILLED, INCLUDING RAPPER AMBUSHED AFTER RELEASE FROM JAIL 

Chicago Mayor Lori Lightfoot’s office did not immediately return a request for comment on Cooper’s death. 

Chicago police have arrested two suspects in the case for questioning. The department did not immediately respond to Fox News’s request for additional information on the suspects. 

CLICK HERE TO GET THE FOX NEWS APP

Carjackings in Chicago have increased in recent years, with 2020 seeing a 135% spike compared to 2019, from 603 carjackings in 2019 to 1,416 in 2020.

The crime has spilled over into 2021, with one particularly violent 24-hour span last month seeing at least five carjackings. Chicago police Supt. David Brown responded to the recent increase by adding 40 officers and four sergeants to a carjacking task force in January.