Mile High Murder, No. 51: Do you recognize anyone in Andrew Gelston Graham surveillance videos?

Update, November 24, 6:45 a.m.: Last night, the Arapahoe County Sheriff's Office sponsored a well-attended public meeting for Centennial residents concerned about the lack of progress in finding the person or persons who took Andrew Gelston Graham's life. ACSO representatives said they're still looking for six people seen in light-rail surveillance videos embedded here. They hope that one or more of them may have seen something that could provide clues about the crime.

Get more details in our original item below, including ACSO contact information to use in case you recognize one or more of the individuals in the assorted clips...

Original item, published November 11:

The Arapahoe County Sheriff's Office is working overtime to solve the murder of 23-year-old Andrew Gelston Graham, who was found dead from a single gunshot wound in front of a house in Centennial not far from his own last week. Example: I caught Sheriff J. Grayson Robinson already on the job at about 6:20 a.m. on Monday. The office's latest attempt to obtain evidence about Graham's killer or killers involves the release of several surveillance videos from a light rail station near County Line and I-25 -- the last footage of Graham alive and safe. In the clip above (and a similar one below), Graham is standing in the background, carrying a satchel. Other videos show that he was the first person off the train.

Authorities don't believe any of the other riders is a suspect -- but they'd like to get into contact with them to find out if they saw anyone or anything nearby that didn't seem quite right. What's described as a "significant cash reward" is available should info lead to an arrest. Call 303-795-4711 to learn more -- and look below to examine three more videos.