exclusively to chase merritt. then a concerned mcstay family friend. joseph was my best friend. he was incredible. now charged with killing them all. this is a cold and callous murder of an entire family. follow our investigation, the evidence, the arrest, the accused. i have a past. in his own words. you were the last person he saw? i was definitely the last person he saw. chasing a killer. inside the mcstay family murders. sunny southern california. the beaches, the surf, the stunning pacific sunsets. yep, another beautiful day in paradise. southern california.