Well, of course
Of course they don't care about these phones or this particular case, they are just using it for publicity like they did with the San Bernadino shooter. No one would care if they had a phone from a mob guy or bank robber, they have to have a "but what about the terrorists" angle to have any chance of getting public backing.
They are playing the same playbook they have for 20+ years when they first floated the "Clipper chip" idea. Real police work is dead, they just want have everything handed to them. Next they'll probably want a law allowing them to jail people for not giving them encryption keys to data found on their home computer, like they do in the UK.