Ebrahimi targeted police officers and a judge after he became obsessed with “limitless revenge” against authority figuresCredit:West Yorkshire Police/PA A police spokesman said: “The effects of this action sowed the seeds of a deep hatred of the police that grew exponentially from that moment.”He believed that the police were committed to destroying his life and set about seeking to take extreme violent action against them.” “He developed a deep-seated and consuming hatred and loathing for people in authority, in the main police officers, and set about research and planning his limitless revenge against them.”Mr Stevenson said: “The volume of weapons, substances and associated material recovered from his property were to enable him to commit the most serious harm to others and I strongly believe that he would have eventually executed his plans in harming a police officer on the streets of West Yorkshire.” Ebrahimi had 90 videos saved that related to the creation of explosives, fuses, detonators and gunpowder.Detective Chief Inspector Warren Stevenson said: “Ebrahimi is a very dangerous individual who posed a significant and very serious threat to police officers, police staff, solicitors and the judiciary. Ebrahimi amassed chemicals and weapons including swords, crossbows and air riflesCredit:West Yorkshire Police/PA His home was raided and officers found a book detailing 21 vehicle registration plates of cars belonging to people he was interested in and photographs of their addresses.His sat-nav revealed that he had visited the address of the judge who issued the non-molestation order and of a police chief inspector.The full home addresses were also found of other police officers he had encountered as well as that of the solicitor working on behalf of his ex-partner.Police also found he had researched the use and effects of chemicals, how police officers are protected when not at work and sophisticated surveillance equipment.A large amount of chemicals were also recovered from Ebrahimi’s address, along with an extensive collection of weapons including knives, swords, crossbows and high-powered air rifles, the spokesman said. He said Ebrahimi was arrested in October 2015 after concerns were raised by Calderdale College about his unusual interest in chemicals and wanting to develop a science lab at home. A man who targeted police officers and a judge after becoming obsessed with “limitless revenge” against authority figures has been jailed for 20 years.West Yorkshire Police said Ashkan Ebrahimi, 33, conducted extensive research on 38 different individuals as he amassed chemicals and weapons including swords, crossbows and air rifles.Senior officers said they “strongly believe that he would have eventually executed his plans in harming a police officer on the streets of West Yorkshire”.The force confirmed that Ebrahimi, of Halifax, was sentenced on Tuesday after being found guilty of possessing explosives with intent to endanger life, possession on an offensive weapon, possession of a bladed article in a public place and stalking offences.A jury at Bradford Crown Court heard how Ebrahimi became obsessed with revenge against the authorities after was he issued with a non-molestation order against his former partner by a judge in the county court and was subsequently separated from his young child. He developed a deep-seated and consuming hatred and loathing for people in authority, in the main police officers, and set about research and planning his limitless revenge against them 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.