Bloodied 'Dexter-obsessed' killer smirks to camera as he is stopped in street by police after murdering woman - as images show inside copycat's Airbnb 'kill room'

This is the moment a student who stabbed a sex worker to death in a Dexter-inspired kill room smirked as he was arrested in a hospital bed.Pouting Benjamin Day, 20, who was obsessed with the US crime drama, simply nods as he is told he is being arrested for the brutal murder of Maria Saceanu, 24. Separate footage released by West Midlands Police today shows officers tending to Day's injured hand shortly after the killing but becoming suspicious about his story about being bitten by a dog.Day – wearing a green khaki long-sleeved shirt the same as worn by Dexter in the show – reacts angrily when they question what had actually happened. He claimed to have been bitten by a wild dog after cutting his hand during the 'gruesome task' of dismembering Ms Saceanu's body. Benjamin Day, 20, was arrested in hospital after injuring his hand cutting up his victim's body He was clutching his mobile phone has he was told he was under arrested for murder Earlier, officers had tended to his injured hand. He told them he had been bitten by a wild dogHe had called 999 for help with his own injury after walking 'some distance' from the property when he had left Ms Saceanu. In the footage one officer asks him: 'Where's the dog? Is it your dog?'Day replies: 'No it is a wild dog...It just attacked me.'The officers then ask him to sit down so they can look at his injured hand, which is wrapped in gaffer tape. He appears to smirk again as one female officer asks him: 'Did you wrap that yourself? Where did you get the gaffer tape from?'Day tells them that he bought it and it was in his car but he can't remember where his car was parked. One of the officers, increasingly suspicious about Day's account, asks him: 'What has gone on? Have you been attacked...because I'll be honest with you, your story doesn't quite check out? So where did it actually happen?'Day reacts angrily: 'I said I don't know.' It comes as pictures show inside the £40-a-night Airbnb where he set up his 'kill room'. Rooms in the semi-detached property on a residential street in Tividale, West Midlands, are still available to rent. Images show patterned bedspreads in each of the three bedrooms. The property in Tividale, West Midlands where Day prepared his Dexter-inspired kill room Images from a rental listing show colourful patterned bedspreads in each of the three rooms It has a single, double and 'deluxe double' available to rent at £40 a night The property also has a kitchen and dining room and garden Day, a forensic sciences student, admitted killing Ms Saceanu on the second day of his trial at Wolverhampton Crown Court yesterday. He had been expected to claim self-defence, asserting he set up the room at an Airbnb to film a 'tribute' to US show Dexter which he could post on TikTok.But after an hour's delay in court, he returned to the dock and appeared to smirk as he nodded to enter a guilty plea.He was remanded into custody, with the case adjourned pending psychiatric assessments.Day, 19 at the time of the killing, is the son of a company director. The court was told the University of Worcester student prepared the room as a 'tribute' to the US drama, lining it with plastic sheeting.The show followed forensic technician Dexter Morgan, who leads a secret double life as a vigilante serial killer.Prosecutors said he was 'fascinated' with Dexter and his actions 'were those of a copycat'.Ms Saceanu answered a text from him shortly after 9.30pm on December 20 and drove to the Airbnb where Day had been 'preparing' since 5.30pm. The prosecution said Day had killed her within a short time of her arrival.A guest staying in another room at the Airbnb noticed a trail of blood and told the landlord, who called police.A Home Office pathologist said Ms Saceanu probably died as a result of wounds to her neck.She also had 'a number of wounds to her hands [which were] consistent with efforts to protect herself'.