Diary entries written by Luigi Mangione reveal the now 27-year-old’s detailed thinking ahead of the alleged killing of UnitedHealthcare CEO Brian Thompson last year, a new court filing shows.

New York prosecutors in the Luigi Mangione case released a new filing Wednesday that includes copies of handwritten notes they say Mangione wrote outlining his plot and motivation for killing ...

A father-of-three accused of murdering his daughters demonstrated more and more unstable behavior in the months before he is alleged to have killed them, court documents show.

Investors are fretting about a clause that would penalise foreign holders of US assets ...