A 13-year-old boy has pleaded guilty to murdering a builder after a row outside a block of flats , making him one of Britain 's youngest killers . The teenager , who can not be named for legal reasons , admitted stabbing 53-year-old Christopher John Barry to death in Edmonton , north London , in December last year . Mr Barry was said to have been involved in a row with a group of youths trying to get into a party at another address in the block of flats where he lived . A 13-year-old boy has pleaded guilty to murdering builder Christopher John Barry after a row outside a block of flats , making the teenager one of Britain 's youngest killers . Mr Barry was said to have been involved in a row with a group of youths trying to get into a party at the block of flats in Edmonton , north London . The attack happened as he returned home with his girlfriend , council worker Sabrina Finn . He was followed into the building by two of the boys before being stabbed in the chest , police said . Ambulance crews attended but he was pronounced dead on the doorstep of his own home . The defendant 's parents as well as relatives of Mr Barry , who was known as Jack and was originally from Cobh , Ireland , all attended the Old Bailey for the five-minute hearing . After being brought into the dock from custody , the boy spoke to his father briefly before the charge was put to him by the court clerk . When asked to confirm his name , the boy replied : 'Erm ... yes . ' The attack happened as Mr Barry ( left ) returned home with his girlfriend , council worker Sabrina Finn ( right ) His guilty plea to a single count of murder was almost inaudible . Dressed in a light blue shirt and grey school trousers , he was remanded into youth custody by judge Anthony Morris . The judge ordered a pre-sentence report ahead of sentencing on April 10 , where the teenager will face a minimum of 12 years in prison . Detective Chief Inspector Neale Baldock , of the Homicide and Major Crime Command , who is leading the investigation , said at the time of the murder : 'The victim and this group were not known to each other - what started as a minor verbal altercation has escalated into a shocking act of violence . ' Residents of the block of flats described seeing 'blood everywhere ' on the landing outside Mr Barry 's home on the night he was killed . Shifal Kemal , 38 , a neighbour of Mr Barry , described him as a 'nice man ' who always smiled when he greeted people . Mr Barry was said to have been involved in a row with a group of youths trying to get into a party at another address in the block of flats when he was stabbed . The NHS worker said : ' I cried quite a lot when I heard . I knew Jack slightly to smile and say hello to , but I know his girlfriend Sabrina more , and she is a lovely , lovely girl . 'We 've been living here for nearly eight years and I think they must have been living here for around the same time . 'He was such a nice man . Every time we saw him he would always be really polite , smile , and say hello . 'They both worked and would leave early in the morning and come back late in the evening , so we did n't know too much about them . But they are both lovely people , who kept themselves to themselves . ' Another neighbour Steven Gregory , 42 , said Miss Finn had complained about homeless people getting into the block of homes . He said : 'They would leave beer cans , and cigarettes everywhere . We 've always had troubles with people trying to get into the block , this times it looks like it was kids . ' Miss Kemal added : 'It 's terrible and quite scary . 'We 've always had trouble in this block with homeless people getting in and causing a nuisance on the stairwell or landings , and leaving lots of rubbish behind . 'We 've also had problems with kids getting into the building , and knocking on doors . '
Boy , 13 , admits stabbing a builder outside a block of flats in north London . Teenager pleaded guilty to murdering Christopher John Barry , who was 53 . The 13-year-old will face a minimum of 12 years in jail after sentencing . Comment: Two boys followed him into the building before he was stabbed , police said .