Attorney Eric Sanders said on his law firm's website that the autopsy found Miriam Carey was not under the influence of alcohol or drugs. Carey was shot to death after a car chase that went from the White House to near the U.S. Capitol in October of last year. The report from Sanders said the "Carey family is understandably upset."
Calls to Sanders' office and to the U.S. Capitol Police were not immediately returned late Monday.
Carey, a 34-year-old dental hygienist, tried to ram her car through a White House barrier on Oct. 3 before leading police on a chase that ended with her being killed. Her 1-year-old daughter was in the car but escaped serious injury.
Carey's relatives have challenged law enforcement accounts that she was delusional and raised questions over whether police used an appropriate level of force. Sanders has said he believes officers who shot Carey mishandled the encounter and should be prosecuted.
Carey, who had been diagnosed with postpartum depression and psychosis, told officers who responded to her Stamford, Conn., apartment prior to the Washington incident that President Barack Obama communicated with her and had set up cameras to record her life for national news outlets, police said.
In an interview Monday with the National Journal, Sanders portrayed the autopsy findings as bolstering his theory that Carey's shooting was not justified.