Lewis Haines is seen driving Lily Sullivan to her death. Chilling CCTV footage captured the final moments of murdered teenager Lily Sullivan’s life – before she was strangled by her killer after she rejected his sexual advances. Lewis Haines, 31, met the 18-year-old at a nightclub in Pembroke last December. The pair are seen on camera after leaving the nightclub together, walking in the direction of an area known as Mill Pond. Moments later, father-of-one Haines unleashed his attack on Lily as her mum sat nearby waiting to take her home safely. Lily Sullivan was just 18 when she was murdered Haynes was sentenced to life in prison with a minimum term of 23 years and four months for the murder. A court heard Haines and Lily were kissing before he led her into an alleyway near the beauty pond – then strangled her before dumping her half-naked body in the water. Haines denied the killing was sexual – but this was thrown out by Judge Paul Thomas QC after Lily’s body was found topless. Judge Thomas ruled that Haynes had tried to force himself on Lily when she tried to leave Mill Lake in Pembroke, West Wales, to find her waiting mother. Swansea Crown Court heard Haines killed Lily because he “couldn’t risk her survival” and tell his long-term partner at home. Judge Thomas said: “His intention was to silence her. No one wanted to know what had happened in the strip. Haynes launched his attack on Lily while her mom sat nearby, waiting to take her home safely. Credit: PA “I’m sure, however, having been in the lane for quite some time with Lily and being intimate with her to a point, Lily decided she was going home to meet her mother. “She made it clear from the phone call if nothing else to her mother that she did not want the intimacy between her and Lewis Haynes to escalate to sexual intercourse. “As he was full of drink, I’m sure Lewis Haynes was disappointed by that because he had expectations and hopes that he would go further.” Lily had spoken to her mother at 2.47am. when he said, “I’ll be there now mom. I’m on my way. I’m a few minutes away. I’m almost there.” But the call was dropped before her mum Anna Sullivan tried to call her 30 times as she sat waiting to pick her up at the nearby Green Garage. Mrs Sullivan, unbeknownst to her, spotted Haynes “walking casually, waving his arms” at 3.09am. when he started “acting weird”. CCTV showed him and Lily walking down the streets together and getting off a lane. He was then spotted alone a few minutes later. Haynes strangled the teenage girl and dumped her body in a lake after she rejected his sexual advances. Credit: PA Prosecutor William Hughes QC said: “He started acting strangely, running down the road even though there was no traffic and walking towards Bush School. He was shaking his head and holding his head in his hands. This happened at 3.09am. “Anna Sullivan decided to follow Lewis Haynes because of his behavior. She lost sight of him as he disappeared into the woods. “Mr. Haynes knew that Anna Sullivan was waiting for Lily at that location.” He added: “The person Anna Sullivan saw at this point was her daughter’s killer, Lewis Haynes.” He killed her to “shut her up”. The court heard Haines went home to tell friend Maisie John: “I’ve drowned someone. They’re in Mill Pond. I’ve been to Mill Pond.” Haynes then told his mum and step-dad that he met Lily at Out nightclub before they “knocked it out” during the night out, the court heard. Lewis Haines pleaded guilty to murder but had denied any sexual motivation. Credit: Media Wales He claimed he launched the attack after Lily had threatened to accuse him of being a rapist when she found out he had a girlfriend. Lily was pronounced dead at 6.02am. before a post mortem by Dr Stephen Leadbeatter found her injuries consistent with “manual strangulation”. Haynes told officers, “I strangled her” when they arrived at his mom’s address. Later he said: “What the f*** have I done?” at the security desk at the station. The court heard Haynes claimed he tried to get into the water to pull Lily out – but the judge said he had put her in the lake “where she wouldn’t be easily seen at night in the murky water”.