It’s hair-raising news for criminals on the run. Scientists behind a new study, published in the journal PLOS ONE, have worked out how to identify individuals solely based on the proteins in a single strand of their hair. While prosecutors already look at DNA from hair as part of investigations, the technique is far from ideal: DNA is easily degradable, meaning it can only be analysed within a certain time period after the crime. But the new technique could even be used to solve historical or archaeological cases, making it far superior to DNA sequencing in many ways.
A strand of hair at a crime scene, or clinging to human remains unearthed by archaeologists, could hold new promise as a means to identify its unique owner and unravel mysteries sealed by the passage of time. In research published this week, scientists from Lawrence Livermore National Laboratories reported they are devising a test of human hair that could fingerprint its owner in cases in which DNA evidence is fragmented, damaged or nowhere to be found. Like DNA sequencing, the test they have devised not only could identify an individual but trace his or her ancestry. The researchers’ discovery, reported Wednesday in the journal PLoS One, addresses one of forensic scientists’ most pressing needs: a