Not necessarily.
Jack the Ripper’s first victims and most of the Cleveland “Torso” Mad Butcher’s victims were done with almost surgical precision.
This is why Dr. Gull and Dr. Sweeney were chief suspects in those cases.
So was the Black Dahlia, but I don’t think those murderers were of the same caliber criminal as a guy mugging people outside ATMs.
Those killers had medical knowledge. Just a guess, but this guy probably wasn’t using the $60 towards med school. Probably more like supporting his local street pharmacists.