WASHINGTON (AP) — A civic activist is asking District of Columbia campaign finance officials to investigate more than $100,000 in payments to the treasurer of Mayor Vincent Gray's 2010 campaign.

The complaint filed last week by Marie Drissel says it's highly unusual for a campaign treasurer to be paid so much. Drissel notes that treasurer Betty Brown had a full-time job at Howard University and has little to no experience working on campaigns.

A spokesman for the Office of Campaign Finance says the complaint is under review.

Gray's campaign is the subject of a federal investigation. Two aides have pleaded guilty to funneling payments to a minor mayoral candidate in exchange for his negative comments about then-mayor Adrian Fenty. Investigators are also looking into businessman Jeffrey Thompson and his ties to district politicians.