Under circumstances, officers violated knock and announce statute when they breached front door of residence 15 to 20 seconds after they began knock and announce.

Officers had no reason to believe there were weapons in residence or that defendant was armed and dangerous the warrant was executed early in the morning, which all but ensured that entire family would be home and might still be asleep; and the officers had no reason to believe defendant knew they were coming or that anyone inside residence was at risk of harm; or that defendant or his family might try to escape or destroy evidence. Therefore, the trial court erred in denying motion to suppress.