Fingerprints belonging to the man charged in last week's murder of UnitedHealthcare's CEO match those found on a water bottle recovered not far from the scene.

Police in New York said Wednesday that forensic investigators were able to match the gun Luigi Mangione was carrying when he was arrested in Pennsylvania to shell casings found at the scene of the Dec. 4 killing of UnitedHealthcare CEO Brian Thompson in midtown Manhattan.

Luigi Mangione, a graduate of Baltimore’s Gilman School, faces five counts, as of Monday’s court filing, including second-degree murder and gun charges.