With The Oxford Weekly Planet pushing for results in the investigation into Zoe's murder, Detectives Armstrong and Murphy are under pressure to find her killer.

Will the Crime Lab's findings give them new clues to follow?

Examine the evidence and share your thoughts in the comments.

Tip: Want to find out what's happened so far in The Last Word investigation? Check out the Case Recap.

Coming up … It just takes one good lead to break a case wide open.