COLD CASE CONFESSION:

For 13 years, a dark secret lay hidden beneath a carpet in southern Johannesburg. Then, on a regular night in 2012, a sweaty supermarket chef renovating his home stumbled across a three-page letter, which revealed the anatomy of a grisly murder. Within days the letter made its way into the hands of a private investigator known as ‘Doc'. Teaming up with a colleague and two detectives from the Yeoville police station, Doc made sure the Betty Ketani case was woken from a long slumber. With the trial still ongoing, not all the pieces of this puzzle have been revealed, but already this is one of South Africa's most intriguing crime stories. Dubbed a ‘troublemaker' for his investigative work, ALEX ELISEEV is an award-winning hard news journalist who has reported from countries such as Haiti, Japan and Libya. Currently an Eyewitness News reporter, he's worked for South Africa's top newspapers, including The Star and Sunday Times.