So that lady I mentioned above printed a notice which she distributed here in the neighbor.
Apparently, the police officers told her that in most cases, they'd build a case but it wouldn't go any further and that people needed to call the DA and push and try to get them to take action.
Seems that the kid aren't too worried as 2 of them were apparently giggling and laughing in the back of the police car, so they may be familiar with the system and know that they'll be back on the street in no time.
Which really bugs me - especially for my wife. I won't be able to let her go out in the backyard for a smoke alone anymore, because, who knows if/when those scumbags will show up again.