"Patriots Day" details the real-life investigation and devastating events that happened during the days following the Boston Marathon bombings on April 15, 2013. Boston police Sgt. Tommy Saunders (Mark Wahlberg) teams up with FBI Special Agent Richard DesLauriers (Kevin Bacon) and Commissioner Ed Davis to hunt down the terrorists responsible for taking the lives of innocent civilians. It's not long before the whole city is involved, scouring the neighbourhoods and outskirts of Boston and looking for potential clues. When a lead checks out, they race to capture him before his next escape. Candor was casted as Li, a MIT grad student, who was dating MIT patrol officer Sean Collier. He was shot to death while on duty during the terrorists' late night escape.