A number of drug possession arrests stem from the use of drug sniffing dogs. They are used in airports, seaports, and occasionally brought in to search vehicles. Wherever the search is conducted, police must have probable cause in order to use drug sniffing dogs.
After voters in Colorado and Washington approved initiatives legalizing the recreational use of marijuana, officials in Pennsylvania were expectedly quizzical about the possibility of legalized marijuana use in the commonwealth.
People may see bank robbers as desperate individuals who are strapped for cash, or greedy opportunists who don't think about making an honest living. While these notions may have some attached to them, money (or the lack thereof) is rarely the single factor in bank robberies. In fact, it could be the manifestation of an addiction.
When someone is suspected of committing a crime, police may take a variety of approaches to investigate the situation. If someone is accused of a drug crime, police may need to pat down the individual to find the drugs, but usually, police need to have a reason to perform this test.