Sampson was a rival of Brendan Brady. In May 2012, Joel Dexter met with Casper and Sampson to do a deal for Brendan. After paying Sampson, the pair refused to sell to Joel and stole his money, with two heavies preventing him from leaving. Joel attacked the heavies and Sampson, but Casper stabbed him with a knife. The next day, Brendan paid Casper and Sampson a visit with Simon Walker. Sampson wound up Brendan over the stabbing, so Brendan and Walker viciously assaulted the pair.
Hellbent on revenge, Sampson made his way to The Loft in June 2012. Sampson kidnapped Joel and left him in the middle of an industrial park, holding a grenade with the pin removed and Joel's thumb on the safety catch. Brendan and Walker later found Joel, also learning that the grenade was a fake.
In August 2012, Brendan and Walker performed a heist, intercepting Sampson's drug supply. However, the pair were caught and arrested.