The wife and two young children of a man killed in the mass shooting at Florida State University asking for a thorough and transparent investigation into how it happened. Attorney Bakari Sellers says they want to know how the 20-year-old student shooter got the gun, where he got the gun and what the University knew about him. 45-year-old Tiru Chabba was visiting the FSU campus as a food vendor when he was shot to death outside the Student Union. Another University dining worker was also fatally shot and six others injured. The shooter faces first-degree murder charges.