Mangione’s “intentions were obvious from his acts, but his writings serve to make those intentions explicit,” prosecutors said in Wednesday’s filing.

Details from Luigi Mangione's handwritten diary "So, say you want to rebel against the deadly, greed-fueled health insurance cartel," he wrote in the notebook. "Do you bomb the HQ? No. Bombs ...

Luigi Mangione wrote about plans to kill UnitedHealthcare CEO Brian Thompson in his diary months before the healthcare executive was gunned down in New York City last year, state prosecutors ...