In this gripping episode of TMZ Live, the latest development in the tragic murder of UnitedHealthcare CEO Brian Thompson is revealed. A potential breakthrough comes as authorities detain Luigi Mangione, identified as a person of interest in the case. Viewers are taken through key details surrounding Mangione's connection to the crime, as well as reactions from the community and law enforcement officials. Dive into the discussion as TMZ explores how this development may shape the ongoing investigation.