An arrest warrant has been issued for Islas for two counts of felony manslaughter, one count of felony driving under the influence, and one count of felony hit-and-run.
Firefighters responded to an apartment around 10 p.m. March 1 after a 2014 Ram 1500 pickup ran into the building, killing 42-year-old Jose Palacios-Gonzalez and 3-year-old Samantha Palacios.
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Police say Islas was driving too fast, lost control and slammed into the apartment building. He allegedly ran from the scene following the collision.
Palacios-Gonzalez was pronounced dead at the scene. His daughter Samantha was taken to a hospital, where she later died.
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Police describe Islas as a Hispanic man who is 5 feet, 8 inches tall and weighs 160 pounds, with black hair, and tattoos on his right forearm.
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"He was allegedly at the Bottoms Up Sports Bar in Long Beach before the crash, and now there's an investigation into the sports bar by the California Department of Alcoholic Beverage Control," FOX 11 Los Angeles reports.
Anyone with information on Montano's whereabouts is asked to call LBPD Detective Kevin Johansen at 562-570-7355. Anonymous tips can be called in to Crime Stoppers at 800-222-8477 or submitted online.