 Both Mick and Sinbad suspected that Tinhead was involved, but Carmel refused to believe he was the culprit.In an effort to make Tinhead a more responsible person Sinbad convinced David Crosbie (John Burgess) to give him a job at the petrol station, but it's not long before Tinhead, who resented being made to work, caused trouble when he put diesel in Ron Dixon (Vince Earl)'s petrol car.Tinhead only started to see the error of his ways when he nearly killed his younger sister, Melanie (Elizabeth Lovelady).