I read it was casso that gave the order to Lastorino. The kid seemed as loyal as they come. Maybe casso thought Testa was much more loyal to Amuso and not him?
I've wondered this myself. I've always put it down to Casso's sheer nut-baggery.
His brother Joey seemed a right nut-bag himself. That smiley mugshot of his has always given me the creeps.
