Flags fly at half staff in front of the justice center at Santa Fe, Texas on Sunday, May 20, 2018. Congregations in this deeply religious community near Houston gathered Sunday for their first worship services since a teenager with a shotgun blasted his way into a high school art classroom and killed 10 people — eight students and two teachers. (Elizabeth Conley/Houston Chronicle via AP) (Associated Press)

The National Rifle Association’s incoming president has linked school shootings and other violence to using medications such as Ritalin.

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 commonplace,” pointing to TV and movies.

North’s comments followed the attack Friday at Santa Fe High School outside Houston that left eight students and two teachers dead. Investigators have given no indication that they believe the 17-year-old suspect, Dimitrios Pagourtzis, used Ritalin, which treats attention deficit hyperactivity disorder, or other drugs.

Pagourtzis’ attorney,…