Leading figures in the world of forensic science have descended on Scotland to learn more about new advances in the study of bloodstain patterns.
The bi-annual conference of the International Association of Bloodstain Pattern Analysts (IABPA) is taking place over three days in Edinburgh.
Experts say the interpretation of bloodstain patterns - where the blood lands and the size and shape of droplets - can be crucial in building the case that puts a criminal behind bars.
By analysing bloodstains left at a crime scene, forensic scientists can help to determine how a victim was injured, the degree of force used against them and the type of weapon involved.
Such evidence was said to be key in the conviction of serial killer Peter Tobin, who is serving three life sentences for the murders of Vicky Hamilton, Angelika Kluk and Dinah McNicol.