Talia is introduced in 2006 as a Llanview police officer investigating an arson in which a man had been killed . She begins working closely with Detective Antonio Vega , with whom she forms and easy friendship and shares her experiences as a member of New York City Police Department on duty in Lower Manhattan on the day of the September 11 attacks . In late March 2007 , Talia , Antonio , and Acting District Attorney Evangeline Williamson figure out that the string of arsons plaguing Llanview are being perpetrated by a white supremacist group known as " One Pure People " . In May 2007 , the Syrian Talia , Antonio 's Latino brother Cristian , African American Evangeline and Jewish returning District Attorney Nora Hanen are gassed by OPP at Cristian 's loft apartment . All survive the attack with few ill effects except Evangeline , who is left comatose . The investigation finally reveals celebrity baseball player Tate Harmon to be the ringleader behind OPP . Talia shoots and arrests him before he murders several hostages
September 11 attacks
September 11 attacks
Talia Sahid