The second girl
(Book)

Frank Marr knows crime in Washington, DC. A decorated former police detective, he retired early and now ekes a living as a private eye for a defense attorney. Frank Marr may be the best investigator the city has ever known, but the city doesn't know his dirty secret. A high-functioning drug addict, Frank has devoted his considerable skills to hiding his usage from others. But after accidentally discovering a kidnapped teenage girl in the home of an Adams Morgan drug gang, Frank becomes a hero and is thrust into the spotlight. He reluctantly agrees to investigate the disappearance of another girl--possibly connected to the first--and the heightened scrutiny may bring his own secrets to light, too.