Anyone can kill anyone. Especially these days, as evidenced in the news. If someone owed an amount of money they couldn't pay back, and they felt their life was threatened, they'd be crazy not to go to the police. It would be their best move.

"...the successful annihilation of organized crime's subculture in America would rock the 'legitimate' world's foundation, which would ultimately force fundamental social changes and redistributions of wealth and power in this country. Meyer Lansky's dream was to bond the two worlds together so that one could not survive without the other." - Dan E. Moldea