DJ AM's mother has added a wrongful death claim to her 20 million dollar lawsuit against Learjet, the manufacturer of the plane that crashed, causing AM severe injuries.

AM's mother, Andrea Gross, says in the amended filing that "The crash ultimately caused Adam Goldstein's death at a later date," indicating the post-traumatic stress AM endured which led him to return to drug abuse.

Learjet has denied responsibility in the crash which caused the death of four people (including the two pilots) and severe burns for AM and Travis Barker.

A trial for the suit is set for March 2nd.