jay liptrot , 43 , was among the first firefighters on the scene of the 200c inferno at a block of flats in prestatyn , north wales .
the jobless alcoholic set fire to a pushchair in october 2012 because she was fed up with it being left outside her door .
liptrot , who then owned 12 properties in prestatyn , gave evidence at smith 's trial at mold crown court on friday .