Serial is a popular podcast hosted by Sarah Koeing, who narrates this interesting factual story over several episodes. 

Each season investigates something different, for example, season one investigated the murder of Hae Min Lee, an 18-year student that disappeared in Baltimore, Maryland.

Season two looked into the capture of US Sergeant Bowe Bergdahl, by the Taliban. And season three focuses on particular cases within the Justice Center Complex in Cleveland.