Dr. Peter Marvit Murder: Surveillance video captures persons of interest in Baltimore researcher's slaying

(CBS/WJZ/AP) BALTIMORE - Police have uncovered surveillance footage of two men running away from the area where a researcher for the National Institute of Health was shot to death last month.

According to CBS Baltimore, the two men are now persons of interest in the slaying of 51-year-old Dr. Peter Marvit near his home.

A police department spokesman says 51-year-old Dr. Peter Marvit was fatally wounded Sept. 17 in what may have been an attempted robbery.

Police say the shooting was reported about 10:30 p.m. in the Herring Run Park area and officers found Marvit outside his car with gunshot wounds to the upper body. He was taken to Johns Hopkins Hospital, where he was pronounced dead. Police say Marvit lived about four blocks from where he was shot.

Now police hope the surveillance pictures could crack the case, CBS Baltimore reports.

"Right now, these are persons of interest. We just wanted to get them ID'd. If you have any information on their names, where they live, anything at all, please contact homicide detectives," said Baltimore City Police Detective Jeremy Silbert.

The surveillance footage reportedly came from a security camera mounted on the outside of a nearby home.

NIH spokeswoman Amanda Fine says Marvit was a contractor with clinicaltrials.gov. The NIH service provides information for locating federally and privately supported clinical trials for a wide range of diseases and conditions.

More on CrimesiderSeptember 19, 2012 - Dr. Peter Marvit, NIH researcher, fatally shot near Maryland home, police say