The killer had gone into the store and bought "a quantity of pills" and Det Supt Fulcher ordered his officers to swoop.

BBC: Sian O'Callaghan's body found after killer's admission

In the meantime the man ordered a third skip and when it was returned it included a large quantity of Royal Mail bags, a garden incinerator and items of semi-burnt mail.

BBC: NEWS | UK | Wales | South West Wales | 40,000 post items found in skips