Help catch the guy:

"The 44-year-old woman was jogging on the Dequindre Cut path near Gratiot around 10:30 a.m. when an unknown man ran up behind her, circled her and grabbed her buttocks. According to a news release from Detroit Police, the woman was armed with a knife and swung it at the man to get him to stop. She was not injured, police said."

http://www.freep.com/story/news/loca...roit/91535858/