 Avon arranges to have Tilghman's heroin supply laced with rat poison and advises D'Angelo to stay off the drug for a few days to prove he's not an addict, but does not tell D'Angelo of the plan.At least one of the inmates D'Angelo was friendly with accepted doses of the tainted drugs.After five prisoners die and eight more land in the infirmary, Avon informs on Tilghman in exchange for an earlier parole board hearing and a recommendation for early release.