An armed robber who held up a shop with a knife was caught because his own former mother-in-law was working behind the till. Kyle Iveson burst into a convenience store and demanded cash from shop assistant Karen Brown, the mother of his ex-girlfriend and grandmother of his daughter. He attempted to disguise his identity by lowering his voice, but she instantly recognised him and was able to report him to the police straight away. Scroll down for video . Caught: Robber Kyle Iveson, left, was apprehended by his own mother-in-law Karen Brown, right . CCTV images show Iveson, 24, taking a 12in knife into the Thorougoods shop in Clitheroe, Lancashire and threatening Mrs Brown, 54. He escaped with £650, but was quickly arrested and has now pleaded guilty to robbery and being in possession of a bladed article. Speaking after Iveson was jailed for three years at Preston Crown Court, Mrs Brown said: 'He was shouting and swearing and straight away I knew it was him. 'He was one of those people who has a certain type of walk and although he had a scarf around his face and his hood up, I recognised him a mile off. 'I think it was half personal and half to line his pockets - but he's stupid and he thought I wouldn't know it was him.' Terror: Iveson was brandishing a 12in knife when he burst into the convenience store . Threat: The robber demanded money from Mrs Brown while trying to hide his identity . The court heard that Mrs Brown had known Iveson for several years, after he had a year-long relationship with her daughter and the couple had a child together. Prosecutor Neil Basarya said: 'She was in a state of panic and attempted to open the till.The till was opened and a large amount of notes were taken by Iveson. 'At one point he dropped some to the floor and collected them before exiting the shop, still holding the knife up.' In a victim impact statement read out to the court, Mrs Brown described Iveson as extremely aggressive and said the robbery had made her feel vulnerable whenever a customer entered the shop wearing a hood. 'All I want is my life back how it was and then I hope I can return to a normal and happy life,' she said. Defending Iveson, Adam Lodge said he was addicted to heroin and had committed the robbery to fund his habit. Mr Lodge said: 'There is some degree of remorse and he does mention that this incident would have been petrifying for her, but mentions she was not the specific target.' Theft: He pulled out £650 in cash from the till but was arrested by police shortly afterwards . Target: The robbery took place at the Thorougoods convenience store in Clitheroe, Lancashire . Judge Jonathan Gibson told Iveson: 'You had a long kitchen knife and you used that knife to point towards the lady who was serving in the shop. 'Not surprisingly, the offence has had a very significant impact on her.' As well as three years in prison, Iveson is subject to a restraining order which bans him from contacting Mrs Brown in any way. Reliving the moment that Iveson threatened her, Mrs Brown said: 'He just came at it with me, he was holding it in the air. He came round the side of the counter and he had the knife at the side of me. 'He was trying to get the till open and he kept saying "You'd better get that till open now", and calling me a b****. 'I was determined not to let him know it was me, I just kept saying, "Calm down, calm down."' After the sentencing, the victim said that Iveson's jail term was 'not long enough', adding: 'It was terrifying for me and it has ruined my life. It's no comfort at all knowing he will be out again in no time. 'I wish I could say he will change but I know he won't. He picked the shop because he knew I would be working, he knew my shift patterns. 'He came in 15 minutes after I'd started my shift that night, and it made it worse for me knowing who it was because I didn't think he would stop at anything. 'My daughter's relationship with him was a mistake and we try not to have anything to do with him. I have my granddaughter out of it and I wouldn't change her for the world, but otherwise I wish he didn't exist. 'He used to take great pleasure in grinning and taunting us when he saw us but we tried to ignore him and not let him get to us. I'm not surprised he did something like this.'
Kyle Iveson, 24, burst into convenience store armed with a 12in knife . But shop worker Karen Brown, 54, recognised him because she is the mother of his ex-girlfriend . She reported him to police moments later and he has now been jailed .