I figure they will just put the info somewhere and do nothing until he is caught later for some other crime. Half the time when I had to call the cops because of theft, they never even show up, just take your info over the phone and say 'we'll let you know'. And when they do show up, they just write down your info, then say 'we'll let you know'. Never heard anything. Hell, yesterday my neighbor called the cops on some guy for pointing a pellet gun to her face after she confronted him for killing local cats. The cops said it wasn't illegal.