Anne Heche Under Investigation for Felony DUI After Fiery Crash into House

Anne Heche‘s horrific crash into a California home now has the potential to land the actress into even deeper legal trouble … she’s now under investigation for felony DUI.

LAPD sources tell TMZ … they’ve now upped the investigation to a felony because the woman inside the home Anne barreled through with her Mini Cooper claims she was injured — suffering cuts requiring medical treatment.

Cops believe Anne was driving under the influence of drugs and/or alcohol … because she was driving erratically and recklessly, hitting a garage and a parked car before slamming into the home.

Cops also took note of a photo of Anne in the car just before the crash, with what appeared to be a bottle of alcohol in a cup holder.

Anne’s rep says the actress is still fighting for her life … she lost consciousness shortly after the crash, and has been in a coma ever since.

TMZ broke the story, Anne almost struck a woman before hitting another vehicle and crashing into a garage in the moments leading up to the fiery explosion.