Kelly and Joseph Tyson are parents on a mission. Their 23-year-old daughter, Iris, disappeared on Mother's Day May 8th after leaving her South Philadelphia home. "She said I'll be right back.

23-year-old Iris Tyson was the subject ... I'm never going to stop," said Kelly Tyson. When police ruled her death a homicide, the Citizens Crime Commission put up a $3,500 reward.