A tight first half burst into life when John Dempster fired home despite being in what would appear to be an offside position. Callaghan was booked for dissent arguing with the linesman over that decision which would prove to be costly when he picked up a second booking 5 minutes from full time after a foul on Graeme Brown.
Brown then did a stunning run down the line and crossed in for fellow sub Marek Tomana to header home in the last minute to seal the 3 points for the Blue Brazil.
5 wins out of 5 now for Cowden who next head north to take on bottom side Elgin City on Saturday.