Over 500 cards for cell phones have been found in the home of killed Ivan Todorov, dubbed Doktora, Interior Minister Rumen Petkov said.
He also commented that this is impeding the investigation for his murder.
In the words of Minister Petkov the contract murders remain one of the most serious problems the Interior Ministry has to deal with.
Doktora was shot dead in downtown Sofia on February 22. The police also found about EUR 10,000 cash and six mobile phones while searching his Porsche Cayenne.
Ivan Todorov became a household name in Bulgaria after a failed attempt on his life in April 2003. Todorov, 42, was the target of numerous police investigations, including goods smuggling and money laundry. His name appeared to be investigated as a mastermind of a large international network of cigarettes trafficking.