Legal Question in Family Law in North Carolina

CPS is staffed with people that more often than not are unpredictable and do and say idiotic things - that said, they likely do have the power to deny grandma custody. It'd be up to grandma and other family members to try and convince a judge to put CPS in their place. As to whether them saying grandma smokes weed is slander or libel depends on two things: 1) whether grandma smokes weed. Truth is an absolute defense so if they can show a record where grandma ever got pinched for weed - there's likely no slander case and 2) whether you can prove grandma doesn't smoke weed and likely that they knew or should have known grandma doesn't smoke weed - that last part is really hard tp prove.