Truth of what happened between Elliott Coulson and ex-girlfriend Kate Malonyay remains a mystery Elliott Coulson , the ex-lover of murdered finance employee Kate Malonyay plunged to his death as detectives tried to arrest him. HE was either the nicest bloke in the world or a compulsive liar whose ex-girlfriend was so scared she wanted to change her locks and take out a court protection order against him. The truth is a mystery because both Elliott Coulson and former partner Kate Malonyay are dead and what happened between them has those who knew them best baffled. Ms Malonyay, 32, was found dead in her Sydney apartment on Monday. On Wednesday Mr Coulson, 32, plunged 26 floors from a Marriott Surfers Paradise Resort balcony moments after a team of detectives knocked on the door of his $500-a-night suite, which had been secured with a chain. The Royal Australian Navy combat systems officer died instantly when he crashed through a metal awning, landing in a fountain outside the foyer of the 5-star hotel. Friends of the pair paint two vastly different pictures of their relationship. In Sydney Ms Malonyay's friends described Mr Coulson as deceitful, while on the Gold Coast his friends said he harboured no "dark shadow." MYSTERY DEATHS: Elliott Coulson plunged 26 floors from the Marriott Surfers Paradise Resort two days after his former partner Kate Malonyay was found dead in a Sydney apartment. Ms Malonyay's best friend, Hannah Everett, said Ms Malonyay had grown increasingly worried about Mr Coulson's personality in the weeks leading up to the pair's break-up in January. "We had concerns and Kate obviously had concerns," she said. She called off the relationship due to the fact he was a compulsive liar and because she had learned a lot of things that he had said didn't make sense. He kept contacting her (after the break-up) saying he wanted to see her, and he kept sending her abusive text messages. She knew what she had to do - she was trying to make arrangements. She was looking for another place to live and at one stage she had booked in a locksmith to come and change the locks but he couldn't come, so it didn't happen. She never thought he would harm her and neither did we - we just thought she needed to get away from him. Ms Everett and Ms Malonyay both grew up on the Central Coast but moved to Sydney to further their careers. Ms Malonyay had been flourishing as executive assistant to the general manager at Challenger Financial Services before her death. The ex-partner of Sydney murder victim Kate Malonyay has fallen to his death as police moved to arrest him. Ms Everett said she last saw her friend about three weeks ago but she had become increasingly withdrawn. "On Monday, I was sending her messages telling her I was worried and asking whether I could bring her anything if she was sick," Ms Everett said. I just kept getting messages back saying: 'I'm fine, there's nothing to worry about. Could we please meet up for dinner, I'd like to chat'. Text messages continued to be sent from Ms Malonyay's mobile even after her body was discovered. A long-time friend of Mr Coulson's family, Martin Harrison, said no one who truly knew Mr Coulson could describe him in such a way. "I have known Elliott and his family for more than 20 years and the Elliott I knew was a popular young man who was focused, but also a joker with those close to him," he said. Mr Harrison said it was inconceivable to think Mr Coulson could hurt anyone, let alone kill someone. "It is not something that the Elliott I knew would ever have done," he said. Something must have gone tragically wrong in that unit in Sydney. Elliott had friends and family who thought the world of him and we will continue to. He was not a 'loose cannon' or a person with a 'dark shadow'. If he was secretive about his career with the navy maybe it was for operational reasons. Mr Coulson's parents, Elliott Sr and Sheila, did not answer the door of their home in the upmarket Coast suburb of Benowa Waters yesterday. A family member said they were too upset to talk. "It's just too early," he said. We have counsellors and the navy coming around and it's not the time to talk to the media. Neighbours have also closed ranks around the family. Greg Stolz, Jessica Elder and Neil Keene