Detroit Police are searching for three suspects who brutally attacked a 64-year-old man inside a liquor store on the city's west side.
Surveillance video shows one man sucker punch Perry Ulmer, who uses a cane, knocking him unconscious.
Another man then swings on him while he's on the ground, stealing his money.
We're told Ulmer has known the three suspects for years.
He says, "It's hard for me to believe. I never thought this would happen but it happened to me."
Police say the suspects left in a silver, four door car. They were back at the scene on Plymouth Friday night, talking to Ulmer and looking for any clues.
Ulmer spent two days in the hospital after his February 6th attack. If you have any information, call police right away.