Authorities in Houston have released additional surveillance video and images from their investigation into the brazen fatal shooting of the onetime doctor to former President George H.W. Bush.
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Cardiologist Mark Hausknecht, 65, was killed June 20 in a residential neighborhood as he rode his bicycle in broad daylight. The shooter was also riding a bike when he rode past the doctor and "turned and fired two shots," police said during a news conference later that day.