Clegg was convicted of manslaughter.
Today in court, Crown prosecutor Scott McColgan said even if the drug offending been joined with the murder charge, there would have been no increase in the sentence.
As well his convictions for murder, attempted murder and assault with a firearm, Skinner now has convictions for possessing chemicals, materials and equipment for making methamphetamine.
Judge David Harvey said he could not increase Skinner's sentence because he was already serving life in prison for murder.
He sentenced Skinner to three years in prison to be served at the same time as his sentence for murder.
Skinner had previously been granted name suppression to protect his fair trial rights, but lost it after earlier pleading guilty to the drugs charges.