Kevin Garvey, Sr. is Kevin Garvey's father and Mapleton's former Chief of Police, who was hospitalized for hearing voices after the Departure. He is now on a personal mission.
Based on his tattoos, Garvey is a Vietnam veteran who was part of the 173rd airborne battalion. After the war, Garvey could not fit in, fathered a son, and joined the French Foreign Legion, disappearing from Kevin's life for three years. 
Garvey later served as the Chief of Mapleton Police Department, alongside his son.