MANHUNT: Suspect Named in Houston Doctor's Death

An arrest warrant has been issued in the death of a Houston cardiologist who was gunned down as he rode his bicycle to work at the Texas Medical Center.

The search is on for Joseph James Pappas II.

"We believe this absolutely is the killer," Police Chief Art Acevedo said.

Pappas, 62, should be considered armed and dangerous, a possibly suicidal, according to HPD.

Acevedo said the death of Dr. Mark Hausknecht was likely a long-brewing "grudge" killing -- because Pappas' mother died on the operating table in 1997 while Hausknecht performed surgery.

Hausknecht was shot and killed July 20. The noted cardiologist's patients had included former President George H.W. Bush.

Tips received by the HPD on Tuesday led to the warrant.

The chief said police checked Pappas' home based on tip that he might commit suicide. Pappas was not there.

The identification of Pappas "is more proof of the excellent results that come from HPD’s top-notch investigators working with information provided by the public, from prominent cases to those that escape widespread attention," Mayor Sylvester Turner said in a statement. "Let us keep the family of Dr. Hausknecht in our prayers as they begin the long road to healing."

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