A frustrated federal judge on Thursday lambasted L.A. city officials for failing to properly track billions in spending on homelessness, and called for a forensic audit to look into potential fraud and waste. He also threatened to appoint a court-ordered receiver to take control of the spending.

At a hearing in downtown L.A., U.S. District Court Judge David O. Carter convened a who’s who of top officials, including Mayor Karen Bass, City Council President Marqueece Harris-Dawson, L.A. County Board of Supervisors Chair Kathryn Barger and City Controller Kenneth Mejia.