Officials from the University of Michigan Department of Public Safety and Security (UMDPSS) said the suspect followed the victim, shoved and spit on him, and then pulled out a pocket knife.

The assault happened on the 800 block of South Forest Avenue near Oakland Avenue around 2:30 a.m. on Sunday.

ANN ARBOR, Mich. – University of Michigan Division of Public Safety and Security is asking for help locating a missing 71-year-old man who walked away from the Michigan Medicine Emergency Room yesterday. Richard Allen Clark, Sr. was last seen at 4:50 p.m. on Tuesday, Sept. 22, when he walked about from the Michigan Medicine Emergency Room. According to U-M DPSS, Clark is 5 feet 6 inches and weighs 134 pounds. He was last seen wearing light blue jeans, black shoes, and a green and gray plaid long sleeve shirt. If you have any information contact U-M Police Department at 734-763-1131 or email U-M Police detectives West or Mathews at mjmath@umich.edu or nfrsdlaw@umich.edu.