The hunt for Antonio’s killer leads us to a mysterious security group called the Sentinels. For the first time, former members speak about their operation at CHOP and describe the person they say shot Antonio at close range.

We Keep Us Safe is part of Focus, a dedicated documentary channel from KUOW Puget Sound Public Radio in Seattle, a proud member of the NPR network.

Get in touch with the team by email at focus@kuow.org. Support KUOW and projects like this by donating at kuow.org/donate/focus.