Forensic science, including DNA analysis and other fields related to examining blood found at a crime scene, is a powerful tool for investigating crimes. But it can be extremely time sensitive. As blood dries, it flakes, which makes it challenging to examine and analyze potential murder weapons decades, or even mere days, later. Las Vegas Metropolitan Police Department senior crime scene analyst Tabatha Paine tests a cotton swab with phenolphthalein. Time was not on the Mob Museum’s side this fall when two of its newest acquisitions, a machete and an ice pick belonging to New York Mafia hitman Roy DeMeo, reached the Museum’s collection. Before they were placed ...