Authorities recovered a “privately made Glock-style semiautomatic firearm loaded with 9mm rounds of ammunition” in the car, according to court documents. [More]
I just identified the “logic” here:

[Via Edmund M]
Notes from the Resistance
Mangione had a ghost gun, a type of weapon that can be assembled at home from parts without a serial number, making them difficult to trace, investigators said. [More]
That and the suppressor will overshadow that he “raised in Maryland, has ties to San Francisco and a last known address in Honolulu, Hawaii,” Democrat strongholds all.
This is apparently his X feed.
And this appears to be his Facebook.
I’m going to look around before they’re deactivated, and gotta say I’m surprised they haven’t been.