Throughout Monday, authorities began showing surveillance images of Dr. Mark Hausknecht and the suspect in his murder. Hausknecht, who was also on a bicycle at the time, was shot on his way to work last Friday morning.
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The doctor can be seen heading north at 6700 Main and crossing into the West Holcombe Boulevard intersection.
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Other photos show the suspect behind the doctor. The shooting happened moments later, one block away.
Later Monday afternoon, new photos taken from a dashcam camera were released showing a clearer look of the suspect.
Police said the suspect was wearing a blue short-sleeved polo shirt, a khaki ball cap, and khaki shorts. The backpack he was carrying was a large, fully loaded, olive green backpack.
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NEW SUSPECT PHOTO RELEASED BY POLICE
So far, no arrests have been made, and police are searching for leads into Hausknecht's death.
Hausknecht was a private doctor who worked at Methodist Hospital and Memorial Hermann Hospital.
Houston police release new photos in death of doctor
On Sunday, friends of Hausknecht remembered the prominent doctor.
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"He just played a very great role in the community," a woman said.
Friends remember prominent Houston doctor
Hausknecht's wife, Dr. Georgia R. Hsieh, called his death "senseless."
"So many have asked what can be done to help. While law enforcement has given you their focus on finding the criminal, I am asking you to use your vote and your voice to stem the tide of this growing public health epidemic," she said in the statement.
READ MORE: Full statement from Dr. Georgia R. Hsieh
Sketch released of suspect wanted in death of prominent doctor