Preview: TMZ investigates Luigi Mangione

New developments revealed in the case of Luigi Mangione, the man accused of gunning down United Healthcare CEO Brian Thompson. Mangione took time from a vacation in Thailand to visit a shooting range -- a decision that now sticks out to some of his travel buddies. LiveNOW's Mike Pache talks about the Thailand trip and other new details with TMZ's Michael Babcock about the latest TMZ documentary - Luigi Mangione: The Mind of a Killer.