Minneapolis police announced that CrimeStoppers is offering a reward of up to $2,500 to anyone who can provide information leading to the arrest of the man authorities allege is responsible for the shooting death of activist Tyrone Williams Jr. last March.

A warrant has been issued for Sid Brady Strickland-Green, Minneapolis police spokesman John Elder said Tuesday, but his whereabouts are unknown. The warrant currently remains sealed, Elder said.

Williams, 33, a father of four, was a local activist who helped coordinate the 18-day street occupation in front of the Minneapolis Fourth Precinct police station following the shooting death of Jamar Clark in 2015.

Williams was the brother of former City Council candidate and Minneapolis NAACP activist Raeisha Williams.

Police have alleged Strickland-Green shot Williams, known as Ty, possibly due to an ongoing dispute with a friend of Strickland-Green’s who was evicted from a duplex that Williams and the friend shared in the 1000 block of Knox Avenue N.

Williams was shot outside a relative’s house in the area of 8th and Elwood avenues N.

To provide information, individuals can call CrimeStoppers at 1-800-222-TIPS (8477) or online at crimestoppersmn.org.