L.A. Noire/Street Crimes

While driving around Los Angeles, so long as you're in a police car, you'll be able to receive dispatch notices for Street Crimes, short events that will require you to provide assistance to members of the public or your fellow officers dealing with smaller crimes.

Each desk has its own set of Street Crimes that can be tackled while playing through cases, or in the Streets Of L.A. "free-roam" mode.

Traffic
There are twelve Street Crimes on the Traffic desk

Boxing Clever
A pharmacy is being robbed; when Cole and Bekowsky arrive, the suspect flees out the back of the store and into a building site across the alley.
 * Location: Corner of Main and 1st St

Jump over the fence and follow the robber up the ladder, around the walkways and up the ladder at the end. When he reaches the end of the upper level, you've got to beat him in a brawl.

Shoo Shoo Bandits
A group of hooligans have mugged a pedestrian and fled up the stairs next to the station.
 * Location: Angel's Flight, Hill St between 2nd and 3rd

At the top of the stairs, turn left down the alley and you'll see the criminals standing a short distance away. You've got to shoot and kill both of them before they can get into the car parked just beyond them.

Homicide
There are thirteen Street Crimes on the Homicide desk

Vice
There are ten Street Crimes on the Vice desk

Arson
There are five Street Crimes on the Arson desk