It’s been one year since a drive-by shooting in southeast Washington that killed four people.

Wednesday marks one year since the shooting, the worst in D.C. in at least 16 years.

To mark the anniversary, friends and family of the victims plan to gather at the John A. Wilson building to help announce a youth mental health and juvenile justice initiative.

One of the men charged in the shooting, Nathaniel Simms, has pleaded guilty to his role in the shooting. Several other people charged in the shooting and a previous incident are scheduled to appear in court for a hearing in the case April 22.

Authorities said at the time the shootings were the culmination of violence that began over a stolen bracelet.