Hillary's back!

Eighteen months after Hillary suffered a personal tragedy, she is throwing herself into her work to try to get over it.

Former soldier Gareth Proctor joins her team and finds himself quickly growing to enjoy his new environment.

The first cold case he works on is the murder of Andrew Feeley.

In 2012, this twenty-one-year-old was found dead in the woods near his home, killed by a single stab wound to the chest from his own knife.

Andrew was extremely unpopular. He was a drug dealer, pimp and bully. His stepdad was one of the main suspects, as they hated each other and often came to blows. Other suspects include Toby Truman and his mother Debbie. Andrew was responsible for getting Toby hooked on drugs.

Given Andrew's criminal background, his murder is thought to be drug-related.

But Hillary's not buying it — she knows it's personal. And a search of the Feeleys' garden turns up some chilling evidence.