What is brandon van grack?

As an AI language model, I do not have access to personal and private information. However, here is some public information about Brandon Van Grack:

Brandon Van Grack is a lawyer who worked in the U.S. Department of Justice's National Security Division as a prosecutor specializing in foreign-agent and sanctions investigations. He is well-known for his work on the Robert Mueller investigation into Russian interference in the 2016 U.S. presidential election. Van Grack also played a key role in prosecuting Michael Flynn, the former national security adviser of former President Donald Trump. He has received several awards for his work in the Justice Department.