On 20 June 1989, a sack filled with dynamite sticks was discovered near a beach house Falcone had rented in the town of Addaura by policeman Nino Agostino. Although Falcone had been threatened before, this failed attempt bothered him in the extreme because it had all the signs of an inside job. At the time, he was meeting Swiss prosecutors Carla Del Ponte and Claudio Lehman from Lugano who were helping to investigate the Mafia's financial holdings in Switzerland. Falcone believed that the assassination attempt not only involved the Mafia but some people in government as well. During the investigations into the money laundering networks of the Mafia, it became clear that former Palermo police chief Bruno Contrada, who had moved to the intelligence service SISDE, had warned a suspect about his impending arrest so that he could escape in time.