It's approaching four months since an unknown man shot and killed 29-year-old Wayne State Police Officer Collin Rose while he was patrolling near the Detroit college campus.

Detroit police on Tuesday, March 7, released new video of a possible suspect running across the road in front of a Detroit Department of Transportation bus. See the video above.

Police believed Rose, one of three officers killed in Detroit in the last quarter of 2016, attempted to talk to a man on a bicycle near Brainard and Lincoln, an intersection near the Wayne State University campus, when he was shot once in the head.

Backup arrived to find Rose dying on the ground about 6:30 p.m. Nov. 22.

The reward for information leading police to the arrest and conviction of Rose's killer reached $82,500 in January.

A video of the suspect riding on his bike was also previously released:

A 31-year-old suspect was initially charged in Rose's death, but the Wayne County Prosecutor's office released him nearly two weeks later and charges were dismissed.

The prosecutor's office denied a records request submitted by MLive for email and communications that might reveal why police arrested the wrong suspect and when they knew the mistake had been made.

Rose, who had been on the Wayne State police force for five years and was a K-9 handler planning to marry in October, graduated from Gull Lake High School and before coming to Detroit worked in the Richland Police Department.

Two other Detroit police officers died in the line of duty in 2016.

Kenneth Steil, 46, of St. Clair Shores, died Sept. 17 of complications resulting from a gunshot wound to his right shoulder suffered five days prior while chasing a fugitive.

Detroit Police Officer Myron Jarrett died Oct. 28 after being struck by an allegedly intoxicated driver during a traffic stop.

Anyone with information about Rose's case may contact Detroit Police homicide or direct tips to 1-800-ATF-GUNS, 1-313-965-2323 or CrimeStoppers at 1-800-SPEAKUP.