Tag: ALS fingerprints
Alternate Light Sources: Finding Fingerprints with ALS in Forensic Investigations
- By : Ian Brophy
- Date : Feb 28 2026
Alternate Light Sources (ALS) reveal invisible fingerprints and trace evidence using specific wavelengths of light. Used in forensics, ALS finds prints on plastic, metal, and porous surfaces where powder fails - transforming how crime scenes are processed.