A former group home worker is guilty of two cases of assault and one of administering a noxious substance against a disabled woman in her care.

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Sylene Piatt suffers from cerebral palsy.

Ashley Johnson assaulted Sylene Piatt, who has cerebral palsy and can't feed herself or speak.

Piatt was once a poster child for Telemiracle, a fundraiser run by Saskatchewan's Kinsmen Foundation to raise money for disabled people. Piatt did not attend court today, but her mother and father did.

The court heard on three separate occasions dating back to March 2011, Johnson forced Piatt to chew peppercorns, and put lemon juice and hand sanitizer in her eyes.

The prosecution said Johnson bullied Piatt because she drooled.

Johnson told court none of that was true, and a co-worker was telling lies about her.

Today, Justice Dennis Maher told Johnson her testimony was not believable. He accepted evidence from another care home worker.

A sentencing hearing will take place at Court of Queen's Bench in Battleford on June 17.

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Roger and Colleen Piatt, the parents of Sylene Piatt, say they're disappointed Johnson was not found guilty on all six charges of abuse. (David Shield/CBC)