Federal prosecutors have identified the alleged mastermind of the killing of a witness in a Frederick drug case. In a court filing Friday, prosecutors said Steven Leroy Stone, 25, ordered the killing. They are asking a federal judge in Baltimore to sentence him to at least 25 years in prison Monday. Stone is the fourth of five defendants to be convicted in the death in July 2005 of David Wayne Lee Jr. Lee had been ordered to testify against Stone and others in a drug and weapons investigation. Friday's court filing reveals that Stone pleaded guilty to conspiracy to commit witness tampering and other charges.

-Associated Press