BOSTON — Boston Police Superintendent William Evans was named Friday to serve as interim commissioner with the departure of Edward Davis from the top job.

As head of the uniformed division, Evans had a major role in the police response to the April 15 Boston Marathon bombings and the capture of suspect Dzhokhar Tsarnaev four days later.

Evans, a dedicated runner, had finished the marathon himself when he learned of the attacks at the finish line and rushed to the scene. Three people were killed and more than 260 were wounded.