PITTSBURGH — The head clergyman at Trinity Episcopal Cathedral in Downtown Pittsburgh has resigned amid allegations of retail theft. Ketlen Solak, bishop of the Episcopal Diocese of Pittsburgh, issued a letter to the Trinity Cathedral community over the weekend. In the letter, Solak said she’d accepted the resignation of Dean Aidan Smith. He was charged with theft and receiving stolen property charges after police say he tried to steal $1,000 worth of baseball cards from the Walmart in Economy. Smith had been on administrative leave since January. In Saturday’s letter, Bishop Solak said Smith’s leave was “prompted by an ongoing investigation into questions we received at the end of December and beginning of January suggesting that he may have failed to safeguard the property of the church.” Procedures within the Episcopal Church for handling clergy misconduct began soon after his leave began, Solak said.