Fallen Montgomery County firefighter Sean DeMuynck laid to rest Published Fallen Montgomery County firefighter Sean DeMuynck laid to rest FOX 29's Shawnette Wilson has more on a memorial service held for Sean DeMuynck, a Montgomery County firefighter who died battling a Fourth of July house fire. LOWER MERION, Pa. - A Montgomery County firefighter who lost his life battling a Fourth of July house fire in Lower Merion Township was laid to rest on Saturday. Sean DeMuynck, a 35-year-old member of the Penn Wynne-Overbrook Hills Fire Company, climbed to the third floor of a burning home on Rosedale Road just after 10:30 p.m. Sunday.