[publius911]

One of the hostages was reportedly a 12 year-old girl.

If there was a 12-yr old involved, she is the daughter, who was waiting in her mother's car, of the dead hostage.
The getaway SUV belonged to another of the three hostages, who was forced to drive.

The robbers were all described as latinos, wearing black or very dark hoodies.

[Domangart]

We will see in the morning. MS-13 is an infestation in the valley.