Suspect Miriam Carey suffered postpartum depression following the recent birth of her daughter, ABC News wrote Thursday night.

Three days after the U.S. government shutdown, Carey allegedly rammed her car into the barriers at Capitol Hill, but no one knows exactly why. According to reports, her 1-year-old child was in the car with her when she tried to storm Capitol Hill, but the child was unharmed. Carey was fatally shot.

The 34-year-old, a dental hygienist from Stamford, Conn., suffered from a “mental illness,” authorities said. According to ABC News, her mother, Idella Carey, said, “She had post-partum depression after having the baby" last August. She added, “A few months later, she got sick. She was depressed. ... She was hospitalized."

Carey had a 1-year-old named Erica, her mother told the news site, and police verified that a girl that age was taken from the vehicle and placed in “protective custody.”

Erin Jackson, a neighbor who lived near Carey’s Stanford home, said she thought the suspected shooter “absolutely” had a mental illness when questioned by ABC News. She added that she remembered the black Infinity sedan as resembling Carey’s, and added that the suspect’s tires had recently been slashed in Connecticut.

But not everyone had the view about the troubled 34-year-old mother. After he heard the news, Carey’s boss, Dr. Steven Oken, couldn’t believe the news about his former employee. "I would never in a million years believe that she would do something like this," he said. "It's the furthest thing from anything I would think she would do, especially with her child in the car. I am floored that it would be her."

Oken described Carey to ABC News as someone who was “always happy” and “nonpolitical.”