Last year, when Tim Deppen and Nishana Ismail's friend and classmate was mugged at the University of Illinois at Urbana-Champaign, the story was all too familiar: as she was walking through campus in broad daylight, two men came up from behind her, snatched her purse, and fled. Without access to her phone, the woman had to find a random stranger who was willing to call for help.…
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