this is "world news now" with john muller and diana perez. good friday morning. we begin with new details about the shooting at the nation's capitol. the suspect is identified as miriam carey. a dental hygienist who lived in stamford, connecticut. police and a hazmat team have been at her apartment complex in stamford since last night. >> a family member in brooklyn, new york, revealing carey suffered from postpartum depression so severe it required hospitalization. our coverage on the shooting begins on capitol hill with abc's jim avila. >> reporter: the unmistakable sound of gun fire as an unarmed woman, sources say had a history of mental illness and a toddler in her backseat eludes police. taking secret service and capitol hill officers on a wild mile and a half ride around d.c. monuments and up america's most important street, pennsylvania avenue. >> i heard gunshots. >> reporter: it started here at 2:12, the southeast corner of the white house compound. the black car rams into barricades that do their job.