ROCKFORD — A fourth person has been charged in connection to the death of William Pickering, a 2019 homicide victim. Authorities announced Wednesday that Colton Kennicker, 22, was found Feb. 24 in Mesa, Arizona, and charged with first-degree murder. Winnebago County Jail Superintendent Bob Redmond said extradition has been approved. On June 1, 2019, Rockford police officers attempted to make a welfare check on Pickering, a 23-year-old local rapper. They went to several locations but could not find him. His vehicle, however, was located near his residence in the 500 block of Fisher Avenue. A day later, detectives spoke to several people of interest and were led to a crime scene in the 5200 block of Indianhead Avenue. They later obtained information that led them to an undisclosed location in unincorporated Winnebago County where Pickering's remains were found.