Baltimore, 1999. Hae Min Lee, a bright teenager disappears after school one day. Six weeks later her ex-boyfriend Adnan Syed is arrested for her murder. He says he's innocent — though he can't remember what he was doing that afternoon. But someone can. A classmate at Woodlawn High School claims to know exactly where Adnan was.
http://www.thisamericanlife.org/radio-archives/episode/537/the-alibi