Katehis is being charged as an adult.
Eyewitness News is told Katehis was taken into custody on Tuesday at the Metro-North train station in Middletown in Orange County and brought to the 76th Precinct in Brooklyn for questioning.
The suspect's parents reportedly helped police track down the teen. His parents are at the precinct.
Katehis reportedly sustained wounds in the attack on Weber, but they were not serious.
Detectives say he answered an ad Weber placed on the Internet looking for a partner in rough sex, and was supposed to be paid $60.
He apparently met Weber in Brooklyn and returned to the victim's apartment.
Weber, 47, was found stabbed to death inside his Brooklyn apartment Sunday. His ankles were bound, and he was stabbed about 50 times. Wounds on his hands indicate he tried to fight back.
Weber worked at WABC-AM for 12 years as the on-air reporter for popular shows such as "Curtis and Kuby."
Since last year, he had worked as a freelancer for ABC News Radio, the national network.
His last newscast was on March 15.
Here is Weber's autobiography, from his Web site georgeweber.net/index.html.
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WEB PRODUCED BY: Lakisha Bostick
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