The men were found guilty of conspiring to send the package. The pieces of mail they sent last year were designed to injure but actually the devices could not explode. McKenzie got “bomb making” tips from US television show The A-Team.
A bank of evidence was mounted against the two, including recordings from a police bug in McKenzie’s car which taped him boasting about “building a bomb”.
There is also CCTV footage of the unemployed builder buying parts including nails for the packages from local shops.
They had previously faced an allegation of conspiracy to murder before it was dropped.