A witness for the prosecution on Thursday politely told George Zimmerman’s attorney that he was acting “real retarded” by suggesting that slain teen Trayvon Martin lied in a phone call just minutes before he was shot.

“Of course, you don’t know if he was telling the truth or not,” attorney Don West insisted to witness Rachel Jeantel, who was speaking to Martin on the phone just minutes before he was shot by Zimmerman.

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“Why would he need to lie about that, sir?” Jeantel asked.

“Maybe he decided to assault George Zimmerman and he didn’t want you to know about it,” West said.

“That’s real retarded, sir,” Jeantel pointed out. “Trayvon did not know him.”

Watch this video from CNN, broadcast June 27, 2013.

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(h/t: Salon)