TULSA, Okla. (AP) — Tulsa's emergency ambulance service has scheduled a special meeting to discuss the employment of its executive director.

Steve Williamson has led the Emergency Medical Services Authority since 1978, the Tulsa World reported. He recently came under fire after being named in a federal lawsuit that alleges a $20 million kickback scheme involving a Texas contractor.

Legal defense for the lawsuit and another similar lawsuit has cost the authority about $2 million so far.

Williamson also has been criticized for his compensation and billing practices that caused some users to pay...