(Multnomah County, OR) -- Multnomah County is losing one of its leaders. The county's chief operating officer Serena Cruz announced her resignation. Although a reason for her departure wasn't given, it comes among challenging times for the county. Last month the county had to delay plans for a controversial deflection center, where people who were arrested for drug possession could seek treatment in lieu of jail. Cruz's last day will be on September 20th. In the meantime, Cruz's deputy, Travis Graves will serve as interim COO. The county says they have hired a consulting firm to search for a new COO.