Detectives zero in on parents Rose-Anne and Kent McLellan, while their son clings to life. While their every action is called into question, police conduct unauthorized searches and interview Nathaniel's three brothers in a basement room.

Audio sources: Toronto Star, CTV News London

Roll out of bed, get the kids to school, then off to work. Just before noon, disaster. A mysterious injury to young Nathaniel McLellan puzzles doctors at two hospitals and sparks what would become a six-year police investigation.

Audio sources: Toronto Star, CTV News London

What began as just another day for the McLellan family would end with their youngest son clinging to life in hospital and a cloud of suspicion hanging over his mother and father. Why did Nathaniel collapse at the babysitter's home? And why did police keep their focus on his parents? Listen to the seven-part podcast series by Toronto Star investigative reporter Kevin Donovan.

The series starts Monday, May 16, here, or at thestar.com/deathinasmalltownpodcast.

Audio sources: Toronto Star, CTV News London