 As the investigation was developing it came to light that one or all three of Tom's sons killed him as they found fibres on the murder weapon that matched to what the boys were wearing the night Tom died.But since each of them got their suits from the same tailor, the police couldn't prove which one of them did it so they arrested them all in the hope that they would turn.While waiting to be called Matthew kept on at older brother Jimmy trying to get him to confess.