Houston cops on Wednesday identified the suspect who allegedly shot and killed ex-President George H.W. Bush’s cardiologist — and said he may have been motivated by his own mother’s death 20 years ago during an operation performed by the victim.

A manhunt was underway for Joseph James Pappas, 65, the suspect in the July 20 shooting of Mark Hausknecht, also 65, a famed Houston heart doctor, NBC News reported.

Houston Police Chief Art Acevedo said that authorities have an arrest warrant for Pappas, who is armed, dangerous and potentially suicidal, NBC reported.

“He’s dangerous, he’s capable and if you spot him please call 911,” Acevedo said, adding that Pappas appeared suicidal based on text messages he had sent and the police investigation.

Cops believe the suspect targeted Hausknecht for the death of his mother.

Details of the suspect’s mother’s death were not available, and it was unclear if medical errors contributed to her demise during surgery.

Cops had previously released surveillance images of the shooting, which occurred as Hausknecht was riding a bicycle to work, and shared eyewitness testimony of the shooting.

The suspect was reportedly wearing a baseball hat, sunglasses, a gray warm-up jacket and khaki shorts at the time.

Former president Bush released a statement about Hausknecht’s death through his spokesman.

“Mark was a fantastic cardiologist and a good man,” read the statement.

“I will always be grateful for his exceptional, compassionate care. His family is in our hearts.”