Callum Wheeler (pictured), 22, used a railway jack - a tool used to lift train tracks - to beat mother-of-two Mrs James to death as she walked in fields and woodland near the back of her home in SnowdownThe family of murdered PCSO Julia James have revealed their heartbreak after a porn-obsessed loner was jailed for 37 years for battering her to death. Callum Wheeler, 22, used a railway jack - a...