Deadly Intent (S07E06)

In Orlando, Florida, a gunman armed with an AR-15 unleashes chaos inside a bustling nightclub, targeting a crowd of 300 revelers. As he barricades himself in the restroom with several hostages, authorities scramble to devise a plan to rescue them before it's too late. Meanwhile, in Washington, a man makes off with a shotgun from a Walmart, prompting K9 units to pursue him as they work to apprehend the thief before he can cause harm.