How can Lieutenant Smith and the department help Detective Smug deal with his stress?

Lieutenant Smith is meeting with Detective Smug to discuss several complaints concerning Smug’s rude behavior toward citizens and other detectives. Smug has been with the department for 15 years and a detective for 10 years. He has a good service record and is generally liked by his peers. He has no history of behavior problems. During the past several months, he has off ended citizens with his obstinate attitude and curt remarks. A fellow detective has privately told Lieutenant Smith that Smug is quick to anger and often condescending. Smug’s behavior seems out of character for him.