This is the best summary I could come up with:

Traditional forensic methods either use toxic powders that can harm DNA evidence or petrochemical solvents that are bad for the environment, the sale of which is increasingly restricted.

“This system is safer, more sustainable and works faster than existing technologies, and can even be used on fingerprints that are a week old,” said Prof Tony James, a chemist at the University of Bath and a co-author of the research.

The team have created two different coloured dyes, called LFP-Yellow and LFP-Red, which bind to chemicals found in sweat and oils in the skin.

Governments, however, are increasingly restricting the use of solvents used in fingerprint detection methods, including per- and polyfluoroalkyl substances (PFAS), sometimes known as “forever chemicals”.

The protein is already widely used in biological research because the GFP gene can be used as a harmless glow-in-the-dark tag to track activity in cells in lab dishes or inside living creatures.

Prof Chusen Huang of Shanghai Normal University in China and the principal investigator on the project said: “We hope this technology can really improve the detection of evidence at crime scenes.”

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