New Delhi, Sept. 17 -- A Utah man accused of fatally shooting right-wing political activist Charlie Kirk has been formally charged with seven felonies, including aggravated murder, as prosecutors announced plans to seek the death penalty. Tyler Robinson, 22, appeared virtually in court on Tuesday, showing little emotion as he listened to the charges being read.

Authorities say Robinson carefully planned the attack days in advance and later confessed through a series of messages to his romantic partner and roommate. New court documents reveal disturbing details of his alleged motive, as well as evidence linking him to the crime scene - including shell casings etched with references to internet memes.

The high-profile case, which has alre...