Protocol of serving 'no-knock' warrants

A tragic situation in Houston on Jan. 28 led to the shooting death of a couple and five officers injured. Houston Police Department officers used a "no-knock" warrant to enter what they believed was the home of someone dealing black tar heroin. 

The investigation is under criticism for the officers not identifying themselves before entering the home.

Are "no-knock" warrants safe and should law enforcement officers opt to take that risk?

Attorney Oliver Brown and former HPD Sergeant Kenneth Perkins discuss "no-knock" warrants with Isiah Carey.