Luigi Mangione, the charged killer within the Brian Thompson homicide case, loved a privileged life … however people who know him say he additionally had a darkish facet.

We go inside Luigi’s thoughts in a TMZ documentary that’s now formally up on YouTube … and if you have not seen it but, now’s your likelihood to compensate for some surprising particulars.

Sources near Luigi instructed us how Mangione turned radicalized earlier than quietly plotting to kill a healthcare CEO … allegedly turning into an murderer regardless of a charismatic character.

What turns into clear in our TMZ Investigates doc … healthcare was not Luigi’s gripe … he was extra involved with company greed … and he seen the American healthcare system as a primary instance.

We talked to people who traveled extensively with Luigi, and uncover how he as soon as turned down a day on the seaside to hit up a gun vary in Thailand … plus we discover out what e-book he tried to purchase 400 copies of.