Circumstantial evidence
Circumstantial evidence attesting to Black's guilt of Cardy's murder had been obtained by Northern Ireland investigators searching through petrol receipts—560,000 in total—stored in his former employer's archives to ascertain Black's whereabouts on the dates surrounding the abduction and murder. Black's trial began with the prosecutor, Toby Hedworth, stating that the discovery of Black's signature upon these receipts was as good as signing his own confession.