Agent Feldman is a Special agent for the Federal Bureau of Investigation.
Season Eleven
Agent Feldman was tasked with keeping key witness Joe Chill safe, at a safe house in Metropolis. However, Chill still ended up killed. When Feldman was assembling his forces outside of the safe house, the Batmobile broke through the perimitter, followed by vigilante Batman getting away in the Batmobile with an injured Superman. Feldman had his people pursue the Batmobile, until Green Arrow (Oliver Queen) got involved and the Batmobile got away from the FBI.
Queen was taken into custody and questioned by Feldman, until Chloe Sullivan-Queen arrived with documents showing that Chill was not killed by either Green Arrow or the Batman, but by Intergang affiliates Oswald Loomis and Victor Fries. As a result, Feldman had to release Queen from custody.