Herald SunRistevski latest: Borce and Karen's phones 'deactivated' on day she went missingHerald SunA NEW tool used by Optus that can pinpoint the exact location of a phone helped track the last activity of slain mum Karen Ristevski's mobile phone, a court has heard. Optus technician Oleg Prypoten, giving evidence in the Melbourne Magistrates' Court ...Phones deactivated on day Karen Ristevski vanishedThe AustralianExpert tells court Ristevski phones went off on day Karen went missingThe AgeBorce Ristevski breaks down in court as daughter gives evidence9news.com.auBallarat Courier -Tweed Daily News (press release) -Yahoo Newsall 13 news articles »