Supervisory Assistant State’s Attorney Margaret Kelley has been appointed state’s attorney for the Ansonia-Milford Judicial District, court sources confirmed.

The state’s Criminal Justice Commission selected the 59-year-old Shelton resident following interviews with 11 candidates. She replaces Kevin Lawlor who was recently promoted to deputy chief state’s attorney of operations.

For the past three years Kelley has served as the supervisor of the prosecutor’s office at the Golden Hill Street courthouse here.

The Ansonia-Milford district handles all criminal prosecutions for the cities of Milford, Ansonia, Derby, Shelton and West Haven and the towns of Orange, Seymour, Oxford and Beacon Falls.

In her more than 30 years as a state prosecutor Kelley had handled 80 serious criminal cases including two death penalty cases.