BROOKLYN - The retrial of a Brooklyn teen who is accused of murdering a veteran radio journalist began today.John Katehis was 16 years old when he was arrested and charged with fatally stabbing George Weber, an ABC radio reporter, in his Carroll Gardens home. Officials say the two met through a Craigslist sex ad that the then-minor had placed. Katehis allegedly admitted to the crime on tape, but claims it was in self-defense, saying Weber displayed a knife and tried to stab him first. Last year, Katehis' trial ended with a hung jury.Katehis' new lawyer, Matthew Cohen, alleges that Weber took advantage of young boys he met online. He says he's trying for a new charge of manslaughter for his client, instead of second-degree murder. In last year's trial, Katehis did not take the stand in his own defense, but Cohen says he may this time. The defense is expected to begin calling witnesses next week.Mistrial declared in radio reporter's death Alleged confession released in radio journalist's murder case Detective testifies in radio journalist murder case Trial begins for teen charged with killing newsman Key evidence allowed in radio reporter slaying trial Slaying puts spotlight on Craigslist Teen arrested in radio reporter's murder