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Officer is released from hospital after fatal Beverly Hills crash

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A female officer who was critically injured in a crash Friday that killed her partner in Beverly Hills was released late Saturday, LAPD confirmed. 

The officer, a trainee who had recently joined the force, left Cedars Sinai Hospital late Saturday, Los Angeles police told CBS2. LAPD declined to release her name. 

An investigation is still underway in the deadly crash, with police not sure what caused a truck to slam into the police cruiser on Robert Lane and Loma Vista Drive. LAPD Chief Beck said preliminary findings indicated that the accident may have been caused by a brake failure on the part of the truck.

The neighborhood was known by residents to have very steep streets, and it is a difficult area for truck drivers to drive in, Beck said. 

A 16-year veteran, Nicholas Choung Lee, 40, was killed in the accident. He leaves behind a wife and two young daughters.

A bank account has been set up to handle donations to the family. You can find information on how to contribute at the LAPD credit union's website.

Correction: An earlier version of this story misstated how long Lee was employed with the LAPD.