A man who murdered his brother and attempted to murder his brother’s girlfriend by setting fire to them on New Year’s Day has been jailed for at least 20 years.Blair Logan, a solicitor’s son, poured fuel over his younger brother Cameron, a 23-year-old psychology graduate, and 25-year-old Rebecca Williams, a radio journalist, as they lay in bed.He also endangered the lives of his parents, David and Catherine, who had to be treated for smoke inhalation after the premeditated attack. The family’s dog, Gomez, also died in the fire at the family home in Milngavie, East Dunbartonshire. She accepted court reports that Logan had “abnormal personality traits” but said there was no suggestion he had a mental disorder and added that he was fully criminally responsible for his actions. Rebecca Williams and Cameron LoganCredit:Universal News The scene of the fire in MilngavieCredit:PA She referred to a letter that his parents had written to the court which said they “find it extremely difficult to reconcile the Blair they know with the Blair who caused Cameron’s death”.Logan previously told detectives he took the petrol from a church garage a month and a half before the fire and stored it in his bedroom.On the night of the fire, his brother and his partner, who lived in Glasgow, had arranged to stay at the family home and Mrs Logan set up an inflatable mattress for them in the living room. They returned from a Hogmanay party at around 4am.At around 7.15am, Mrs Logan was woken by the family dog whining and when she went downstairs she saw a figure in dark clothing standing inside the living room.Miss Williams also saw a man in the room, holding something that was on fire, and she and Cameron both screamed.Alex Prentice QC, prosecuting, told the court last month: “Catherine Logan then heard Cameron roar in surprise, shock and fear, before the accused made a jerking motion with his arm as if throwing something.”The accused then ran from the living room and went out the front door. Catherine Logan slammed the door behind him, shouting something like ‘get the hell out of my house’, still not knowing who it was.” Logan pleaded guilty last month when the court heard the two brothers had a “hostile” relationship. He told police they had not spoken since the death of their grandmother in 2013.He admitted pouring petrol over his brother and his partner on January 1 this year “with the intention of maiming or crippling” Cameron, but claimed he did not mean to kill him.The attack was said to be in retaliation for a recent incident at the house when his brother had punched him.Sentencing Logan at the High Court in Edinburgh, the judge Lady Scott said he had “acted with wicked recklessness” and his brother died a “horrible death”. She added: “Cameron was my best friend and partner. He was a caring, respectful and loving man, who I wanted to spend the rest of my life with. He had great ambitions to join the police force and was working hard towards building our future together, a future that has now been stolen from us.” A computer seized from Logan’s bedroom showed that from October 2016 he had carried out internet searches on burns victims.The 27-year-old, a Tesco store assistant, admitted killing his brother during a police interview on January 13. He told officers: “It was not my intent to kill him but I did do it.”When charged with the attempted murder of Miss Williams, he said he thought she was out of the room, adding: “I did not wish to murder my parents.” Miss Williams managed to crawl out of the room into the kitchen, and put her head in the fridge in a bid to protect herself from the fire.Logan’s father tried to get into the living room but was beaten back by the flames. After he escaped from the house he and a neighbour rescued Miss Williams. She suffered burns to her hands, arms and face, which has left scarring and has undergone surgery four times. Shelagh McCall QC, defending, said her client had shown genuine remorse and viewed the murder of his brother as “horrific” and unjustifiable. Rebecca Williams looks on as her father Philip reads a statement on her behalfCredit:PA Want the best of The Telegraph direct to your email and WhatsApp? Sign up to our free twice-daily Front Page newsletter and new audio briefings. Blair Logan was jailed for at least 20 yearsCredit:PA Both parents were in court, along with Miss Williams and her family, as the sentence was passed. Miss Williams previously described her boyfriend as sensitive, kind and funny and said he wanted to become a detective.In a statement read on her behalf outside court she said she found it almost impossible to “put into words the devastating impact this cowardly act has had upon me and my family”.