Luigi Mangione, who was detained at a McDonald's in Altoona, Pa., has been identified as the suspect believed to have shot and killed UnitedHealthcare CEO Brian Thompson last Wednesday in New York City.

The shock slaying of UnitedHealthcare CEO Brian Thompson has all the makings of a “vendetta” assassination carried out by a man with “personal grievances” against the health insurance company he oversaw.

The suspect's family in the murder of UnitedHealthcare CEO Brian Thompson said they are "shocked and devastated." Follow Newsweek's live blog.

Democratic Massachusetts Sen. Elizabeth Warren excused the outrage at the healthcare industry many Americans have expressed following the assassination of

Violence is never the answer, but people can be pushed only so far,” Warren said. “This is a warning that if you push people hard enough, they lose faith in the ability of their government to make change.