The Calcasieu Parish (La.) Sheriff's Department is looking for a "person of interest" in the shooting deaths of four people in Lake Charles, La. over the weekend. In a press release issued through the Meridian Police Department, CPSD Sheriff Tony Mancuso said investigators there are looking for Lee Roy Williams, 52, whose last known addresses prior to living in Lake Charles were Meridian and Chicago, Ill. Mancuso said Williams as a resident of the mobile home where the murders occurred and was last seen at the location on Friday. Mancuso said Williams has not been seen since. Authorities are still looking also for the dark blue Ford XLT Explorer Williams is said to have bought in Meridian. The license plate number of the vehicle was last reported at #LCE 755.