The police use fingerprints, CCTV, and DNA to find criminals. A new study shows that moss is also useful. In the study, scientists looked at when the police used moss to help solve crimes. One scientist said he wanted the police to understand more about how important and useful moss was.

Moss first helped the police in 1929. In 2013, moss on a man's shoes helped the police to find where the man's baby was buried. The baby's father was put in prison for murdering his baby. Another scientist said she wanted the police to understand more about how moss can help them in their work.