The police should <A HREF="http://news.zdnet.com/2100-1009_22-5893816.html?tag=zdnn.alert">talk more to security companies</A> that gather vast amounts of data on the activities and whereabouts of hackers and virus writers, a security expert urged. Peter Tippett, chief technology officer at Cybertrust, said that information provided by the security company led to the successful arrests of the writers of the Melissa and Kournikova viruses, yet he says the police still rarely ask him for intelligence.