The Detroit Police Department is asking for the public's help to find a possible witness to the murder of Wayne State University police officer Collin Rose.
Officers have released video and photos of the person they are searching for.
He was seen in the area of Lincoln and Brainard on November 22, 2016 at around 6:35 p.m., when, police say, Rose made contact with Deangelo Davis, the man suspected of killing him.
Davis has been charged with murder in the case.
Anyone with information is asked to call either Detroit police at 323-596-2260 or Crime Stoppers at 1-800-SPEAK UP.