"You have nothing to fear if you're not going to be a criminal," said a spokesperson for the Bensalem, Pennsylvania police.
The idea that ballistics -- marks made on bullets and casings by the gun they are expelled from -- can be relied upon as evidence is something most of us are familiar with. We've seen it on the CSI shows.
Recently, the Des Moines police became the first Iowa police department to install an in-house machine that can analyze shell casings and access a federal ballistic imaging network to identify potential matches with firearms. Now, that system has been used to match a particular handgun to shell casings found at a robbery scene. As a result, an 18-year-old Ankeny man is facing criminal charges.
Recently, about 1,400 forensic pathologists, fingerprint examiners and other crime scene investigators from across the country met in San Antonio for the International Association for Identification's annual International Educational Conference. At the top of the agenda was improving the standards for collecting, testing and presenting forensic evidence.
With marijuana now legal for either recreational or medical use in the majority of states, drugged driving appears to be on the rise. Unfortunately, there is no straightforward way to test whether someone is actually impaired by marijuana. It's easy enough to test for the drug's metabolites, but those remain in the system for weeks, while the drug's "high" only lasts for a couple of hours. Law enforcement has been seeking a so-called 'pot breathalyzer" that could test for actual impairment, not just exposure to the drug.