HAMILTON--Several local agencies returned to the scene of a sewer where the skull of a missing man was found last year. Hamilton Police, Butler County Coroner Dr. Lisa Mannix, Butler County Emergency Management, and the Butler County Technical Rescue Team searched for more remains and evidence in connection with the death of William Lee Campbell, who was 46 years old when he disappeared in 2022. His skull was found during a routine inspection of the sewer at Martin Luther King and Market Streets last August. A human remains certified K-9 was lowered into the sewer, looking for more remains or clues into Campbell's death.