Radio hosts Kyle Sandilands and Jackie O will not be prosecuted for contempt of court over on-air comments made during mushroom murderer Erin Patterson's trial.

Sandilands took to the airwaves on KIIS FM and said "lock that bitch up" during a news segment about the case on June 16.

It was the same day prosecutors began closing arguments in the high-profile trial.

"Is this big lump still getting around, this big lump … miserable looking thing," he said on the Kyle and Jackie O show.

"My question is how strong is her case?" his co-host asked.

"Not strong, not strong for her," Sandilands replied.

Later in the segment, Sandilands again accused Patterson of being guilty.

"The rest of us already know … come on bro, you can tell by looking at her, lock that bitch up," he said.

"Takes too

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