If this is true arrest whoever was in his Discord group because “LMAO” etc. that is internet vernacular. LEOs will have the whole Discord chat and for me it it suggests there was more involved.
These people are all accomplices and accessory to murder in my book,.
It’s all fun and games, until....
At the very least, I think some of this assassin's friends are guilty of knowing of his crime and not reporting it to the authorities (misprision of felony) or, even more serious, helping him avoid capture (accessory after the fact).