Trial of accused Weber slayer is on

The trial of the Queens teen charged with butchering WABC radio broadcaster George Weber last year during a twisted sexual rendezvous in his Carroll Gardens home got underway on Monday — with the alleged murderer claiming it was all self-defense.

Prosecutors allege that 17-year-old John Katehis met Weber through a Craigslist ad and agreed to come to the older man’s apartment on Henry Street knowing he would be paid for sex.

Yet Katehis’s attorney, Jeffrey Schwartz, asserts Weber lured the teen to his apartment and plied him with booze and cocaine before demanding sexual favors from him.

“It was like a spider luring him to his web,” Schwartz told reporters. “He was lured into the apartment and Weber wanted him to do some funky stuff.”

That said, Katehis did confess to the murder.

In the videotaped confession, Katehis chuckled as he noshed on a donut and remembered how Weber wanted his hands and feet bound and how he asked the teen to “smother” him.

But things got bloody when Weber pulled a knife, Katehis said.

“I got paranoid. I went to grab the knife; he was supposed to be smothered, not [do] something with a knife,” Katehis explained before pointing to his throat. “The knife just goes in and jabs him in the neck.”

Katehis claims that he only stabbed Weber once, but the Medical Examiner said something more grisly had transpired: Weber was stabbed 50 times as he died, investigators were told.

Once Weber was dead, Katehis shucked off his bloody clothes, put on some of Weber’s and fled. He was arrested a few days later at a friend’s home upstate and has been incarcerated ever since, according to prosecutors.