NRA links school violence to Ritalin but experts deny connection

The National Rifle Association's incoming president has linked school shootings and other violence to the use of medications such as Ritalin, but a medical expert who's studied the drugs says there's "no evidence whatsoever" of a connection.Retired Lt. Col. Oliver North told "Fox News Sunday" that perpetrators of school violence "have been drugged in many cases" and "many of these young boys have been on Ritalin since they were in kindergarten." He also blamed a "culture where violence is common