Erin Sperrey was working as a supervisor at a Tim Horton's in Maine when she was killed by one of her staffers. CNN's Carol Costello interviews Erin's mother and sister about their efforts to promote workplace safety.
Erin Sperrey was working as a supervisor at a Tim Horton's in Maine when she was killed by one of her staffers. CNN's Carol Costello interviews Erin's mother and sister about their efforts to promote workplace safety.