Connected, brainy, athletic: the suspect in US insurance CEOs slaying [Video]

The suspect in the high-profile killing of a health insurance CEO that has gripped the United States graduated from an Ivy League university, reportedly hails from a wealthy family, and wrote social media posts brimming with cerebral musings.

Luigi Mangione, 26, was thrust into the spotlight Monday after police revealed his identity as their person of interest, crediting his arrest to a tip from a McDonald’s worker.

He has been connected by police to the fatal shooting of United Healthcare CEO Brian Thompson last week in broad daylight, in a case that has laid bare deep frustrations and anger with the nation’s privatized medical system.

News of his capture triggered an explosion of online activity, with Mangione quickly amassing new followers on social media as citizen sleuths and US media try to understand who he is.

While some lauded him as a hero and lamented his arrest, others analyzed his …