The woman authorities believe led police on a chase from the White House to the Capitol building before being shot to death suffered from post-partum depression.

The mother of 34-year-old Miriam Carey, the Connecticut woman the Associated Press identified as the driver of the black Infiniti, told ABC News that a “few months” after the birth of Carey’s child “she got sick. She was depressed. … She was hospitalized.” Idella Carey said her daughter had “no history of violence” and did not know why she would be in D.C.

An approximately one-year-old female child was removed from the car after the chase and is in protective custody. At a Thursday press conference, D.C. police Chief Cathy Lanier said the incident did not appear to be an accident.

One Secret Service agent and one Capitol Police officer were injured during the pursuit, and both are expected to be fine.