Killer's sister 'found dead' in burnt-out house

Police believe that William Spengler, the ex-convict who shot dead two firefighters after setting his house on fire, also killed his sister.

A charred body found in the burnt-out home is thought to be that of Spengler's sister, Cheryl, 67.

It has also emerged that Spengler, 62, was armed with a .223-calibre Bushmaster rifle during his shooting spree in Webster, New York – the same model used by Adam Lanza at Sandy Hook school in Newtown, Connecticut, earlier this month.