An investigation is being conducted after a prisoner at the Parklea Correctional Centre, in Sydney's north-west, uploaded a video to YouTube showing him in possession of a knife, a "slasher" and the drug ice.

<p class="first">An investigation is being conducted after a prisoner at the Parklea Correctional Centre, in Sydney's north-west, uploaded a video to YouTube showing him in possession of a knife, a "slasher" and the drug ice.</p>

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