Plot: One of television’s most groundbreaking true crime series, America’s Most Wanted, returns to FOX with its prolific and Emmy-Award winning series host John Walsh stepping back into his role, this season with his son, Callahan Walsh, joining him as co-host. Each week, John and Callahan will turn to viewers’ leads and information as they analyze some of the nation’s most gripping cases, ranging from horrific murders and deadly drug rings to devastating teenage overdoses and more