Matt was a rookie police officer in Philadelphia and was married to Stacey for an unknown amount of time. Together, they had one daughter, Kaylee Ehrmantraut. Matt was also very close to his father, Mike Ehrmantraut, whom he always admired very much and hoped to one day become a successful police officer just like him. Matt worked with his longtime partner, Officer Hoffman, who one day came to him offering dirty money, which Matt denied, believing it was the right thing to do.