The mother of late Alice In Chains singer Layne Staley has filed a lawsuit against the surviving members of the band.

Nancy McCallum is asking for a court order establishing her right to 16% of the group's revenue as well as any of her son's assets currently controlled by the band.

According to the lawsuit, an attorney for Alice In Chains members Jerry Cantrell and Sean Kinney told McCallum last September that the revenue-sharing agreement that had seen her paid in the decade after the singer's death would be terminated. Band attorney Peter Paterno also alleged in a December 2012 letter that McCallum has tried to trademark the band's name.

Staley's former bandmates say the singer's heirs will be able to collect royalties on songs he wrote or co-wrote, while arguing McCallum no longer has a role in the band's business decisions.

Staleydied in 2002 after a long struggle with heroin addiction.

Read more: Seattle Post-Intelligencer