Cops say an illegal Mexican immigrant with a long criminal record and who had been deported a staggering five times killed a 42-year-old mom in a drunk driving crash.

Estuardo Alvarado, 45, was arrested after slamming his car into the rear of Sandra Duran’s vehicle in Los Angeles.

Investigators say he had fled an earlier crash.

Duran died at the scene of the crash.

Alvarado has been charged with murder and gross vehicular manslaughter while intoxicated. He has pleaded not guilty to all charges.

During his on and off time in the U.S., Alvarado has racked up more than 20 entries on his rap sheet, including weapons possession, DUI and marijuana possession.

bhunter@postmedia.com