A drink and drug-fuelled father-of-five who had just been released from prison dragged his girlfriend by the hair and threw her “like a ragdoll”. The woman was desperately trying to flee her Canterbury home on Christmas Eve last year when Sam Richards violently manhandled her. As she straddled the flat window, with a friend outside assisting her escape, he grabbed her from behind and pulled her back inside. But the 43-year-old’s force caused her to hit a table and the floor, knocking over the Christmas tree and leaving her with what she feared to be a dislocated hip. When she did finally manag…