Carey's boyfriend, Eric Francis, called Connecticut police twice in 2012 to report that Carey was acting irrationally and putting her toddler in danger, the sources said.
Carey's 1-year-old daughter was travelling with her when she led police on the chase in Washington on Thursday. Carey's mother, Isabella Carey, told ABC News that Carey suffered from post-partum depression after having her daughter last August.
Carey also had a family history of schizophrenia and was taking medication for a mental illness, the sources said. When Francis called police on Dec. 21, he reported that his girlfriend was "off her medication" and acting erratically, according to ABC News.