Gary Allen told probation worker he fantasised about killing sex workers, jury told He is standing trial accused of the murders of Samantha Class and Alena Grlakova Updated Gary Allen is on trial accused of killing Samantha Class in 1997 and another woman in 2018 (Image: Hull Live) Gary Allen told a probation officer he fantasised about hurting and killing sex workers during a chilling meeting. Allen, 47, formerly of Grimsby is currently standing trial accused of the murders of Samantha Class in 1997 in Hull and Alena Grlakova in 2018. Samantha's body was found on the banks of the Humber near North Ferriby in 1997. She had been beaten, strangled and run over.