"Witness" and "Chinatown"

Robert and Jeff settle in for a Double Feature. This week it's "Witness" and "Chinatown." 
First up, "Witness." While protecting an Amish boy - who is the sole witness to a brutal murder - and his mother, a detective is forced to seek refuge within their community when his own life is threatened.
Followed by, "Chinatown." A private detective hired to expose an adulterer in 1930s Los Angeles finds himself caught up in a web of deceit, corruption, and murder.