Earlier quoted context omitted.
The article mentions Instagram DMs. I don’t think those could be spoofed. Law enforcement would have to care and Instagram would need to get a subpoena, but they should be able to provide a lot of info on the account that sent the message (geoip, behavior, etc).
I think not many PDs would invest resources trying to avoid some private person’s username from being stolen. I’d be upset if it happened to me but I doubt anyone else would care.
It seems like once law enforcement engaged it was quick since they arrested 3 days after someone died from a swat. But getting law enforcement to be interested is the problem.