(Virginia Beach, Va.) — The suspected gunman in a Virginia Beach massacre that killed 12 had notified a superior of his intention to resign.

City manager Dave Hansen said at a news conference Sunday that “the perpetrator’s performance was satisfactory” and that he was an employee “in good standing” at the Virginia Beach city department where he worked.

Hansen said in response to a reporter’s question that the shooter had notified his chain of command of his intention to quit his job via email on Friday, hours before the shooting.

Authorities have identified 40-year-old DeWayne Craddock as the shooter at the municipal building on Friday afternoon. He worked in the city’s utilities department as an engineer.

He was killed following a gun battle with police.

Police Chief James Cervera said he had “no information” to lead to the conclusion that the suspect had targeted anyone specifically.