Who is Agent Ernie Hoag from The Abduction and what is their importance?

Agent Ernie Hoag is a retired FBI agent. He is also a long time friend of Brajansky. Hoag goes with Brajansky to investigate the warehouse, and when Meg knocks Brajansky out, Hoag rushes to help. Hoag hears the kidnappers exiting the building, But he is unable to stop them.