ANN ARBOR, MI - Two people are in custody following a daytime robbery at gun point in Ann Arbor's Argo Park.

A 56-year-old Highland man called police about 7 p.m. Sunday, Aug. 13 to the area of the Argo Cascades for a man who had approached him, pointed a black handgun and demanded his wallet and cellphone, Ann Arbor police Detective Lt. Matthew Lige said.

The man told police that he complied and the suspect ran away with no shots fired and no injuries.

As officers converged on the area, they spotted a man matching the suspect's description fleeing on foot, Lige said. The man fled across the river and into a wooded area, and was arrested near the cascades about an hour later with the help of a University of Michigan police K-9 officer.

Police believe the 36-year-old man wasn't alone in the robbery, however.

Officials believe the man's girlfriend, a 30-year-old Tecumseh resident, had knowledge of the robbery and knowingly misled investigators, Lige said. She was located in a tent near the cascades and a handgun suspected to have been used in the robbery was also found.

The pair were lodged at the Washtenaw County Jail and are expected to be arraigned on Monday, Aug. 14.