Sure!
First off, eliminate universal healthcare, as well as any controls on poverty. Make sure you get your justice system involved. Have them focus on the homeless, and poverty stricken areas. Criminalize any form of chemical dependency your populace turns to. Jail as many as possible.
Get the business community involved. Have them collude to deny work to anyone who has ever become associated with your justice department.
Happy, healthy, thriving people won't shoot up schools no matter how many guns you give them. You really need to focus on making them sick and miserable before you can hope to see any results.
Good luck!