A sex offender who was allowed to walk free from a secure hospital viciously raped a jogger at knifepoint during a four-day spree of violence. Louis Collins has now been sentenced to life imprisonment, to serve a minimum of 11-and-a-half years at Kingston Crown Court. The court heard how the 29-year-old hit the woman over the head and forced her to the ground in Marble Hill Park in Twickenham. After brandishing a broken bottle and knife, he said “don’t scream, nobody’s going to help you”, before tearing her clothes off and assaulting her. Two women walked over to the scene after they heard the…