Fingerprints are getting rarer - everyone's seen the TV shows. What new tools can we bring in to confirm a criminal's identity, and is it ethical to use them?
It's not always clear what drives a criminal to act the way they do. How does the justice system deal with offenders whose behaviour is rooted in mental illness?
DNA is the go-to forensic evidence in many criminal cases. What other trace evidence can be used to identify the perpetrator when they don't leave DNA behind?
Cold case reviews often have to battle misinformation and conspiracy theories, as well as missing pieces. How do investigators see through the chaos to a solution?