I think RVN's post here my help with that question.
MURTHA's record on his website
Distinguished Service Medal of the United States Marine Corps, upon his retirement from the Marine Corps Reserves for 37 years of distinguished service to his country, 1990. Distinguished Service Medal, Pennsylvania's highest honor, 1977. Meritorious Service Medal, Pennsylvania's second-highest honor, 1976. Bronze Star with Combat V, 1966. Purple Heart, 1966. Purple Heart, second award, 1966. Vietnamese Cross of Galantry, 1966. American Spirit Honor Medal of the Marine Corps Recruit Department, 1952.
However in the document provided by his office purportedly from the Marine Corp said: "The records of this Headquarters show that you are entitled to the Purple Heart and a Gold Star in lieu of a second Purple Heart for wounds received in action against insurgent Communist Guerrilla forces on 22 March and 7 May 1967 in the Republic of Vietnam," according to the letter signed by an individual identified only as A. Gardoni. Gardoni's title is not listed on the letter.
Now it would seem that he was awarded medals before he was there...move over skerry...you got company!!
So Murtha had the medals before he got them.