Police: The search continues as image of the doctor's shooter spotted on the video

A day after a beloved cardiologist was shot dead for work, the Houston police have trouble concentrating about a crime that shook the city. Knit medical community.

Dr. Mark Hausknecht, a renowned doctor who previously treated former President George H. W. Bush was shot dead by a cyclist who was passing in broad daylight on Main Street, according to police. The 65-year-old man died Friday morning at Ben Taub Hospital.

It is not known if the murder was random or targeted. But, within 24 hours of the murder, the police found at least one video clip of the suspect and continue to look for others, hoping to receive tips from the public

"C & # 39; "It's a crime that makes no sense," Houston police chief Art Acevedo said Saturday. "We do not even have a motive yet."

The Houston Methodist doctor was on his bike near the intersection of Main and Holcombe when the shooter overtook him from behind, police said. Two blocks later, the shooter turned back on his mountain bike and shot at least twice. The doctor went down immediately and the gunman went northbound

The wanted man is described by the police as a 30-year-old man, clean-shaven, white or Hispanic, wearing a gray jacket , khaki and tan shorts. baseball cap and sunglasses. It is about 5 feet 10 inches with a slim build, police said.

Investigators traveled the region for the suspect's video, and Acevedo said Saturday that they had found some but still needed it. ] "We still hope that the community in his neighborhood and on his way to work will all look through their home video and video cameras and examine them to see if they see the doctor coming to work – and if they see anyone following him, "said Acevedo

Investigators hope to piece together the exact movements of the doctor on the morning of the assassination.

" The more we have of " eyes on video cameras, "said the leader," the bigger the chances are "

Even when the police investigation has unfolded, the grieving widow of Hausknecht spoke of the need a law on gun control

"Senseless & # 39; has become a commonplace adjective to describe these tragedies. the mistaken notion that any society "With more firearms is a safer society," said Dr. Georgia R. Hsieh at the Chronicle in a statement released Saturday. "When students can not go to school without fear and teachers need to arm, what did this country do?"

His widow also wrote that the killed doctor loved Houston and she thanked the community for its support. It is not clear if any watches have been planned yet.

"Many asked what can be done to help," she wrote. "As law enforcement forces have directed you to search for the criminal, I ask you to use your vote and your voice to stem the tide of this growing public health epidemic. Hausknecht graduated from Baylor College of Medicine in 1980 and began practicing in Houston seven years later. He cycled every day and took exceptional care of himself, according to those who knew him.

In the hours following his death, his colleagues, his patients, and his colleagues fondly remembered him. all fail to see Mark in the hallways and see patients in the catheterization and coronary care laboratory, where he was known as a compassionate physician with a phenomenal bedside manner, "said Methodist President Dr. Marc Boom. "Our employees who worked with him said that patients were so proud to call their doctor."

In 2000, Hausknecht appeared at a Methodist press conference with Bush after the 41st President was treated for an irregular heartbeat. The former president's spokesperson offered his prayers and condolences to the family, colleagues and supporters of the doctor.

"Mark was a fantastic cardiologist and a good man," Bush said in a statement. "I will always be grateful for his exceptional and compassionate care, his family is in our prayers."