by his former head of security, John Pole. Later in his life, Maxwell had become increasingly paranoid about his own employees and had the offices of those he suspected of disloyalty bugged so he could hear their conversations. After Maxwell's death, the tapes remained in Pole's suitcase and were discovered by the researchers only in 2007. Aftermath of Maxwell's death Maxwell's death triggered instability for his publishing empire, with banks frantically calling in their massive loans. Despite the efforts of his sons Kevin and Ian, the Maxwell companies soon collapsed. It emerged that, without adequate prior authorisation, Maxwell had used hundreds of millions of pounds from his companies' pension funds to shore up the shares of the Mirror Group to save his companies from bankruptcy. Eventually, the pension funds were replenished with money from investment banks Lehman Brothers, Coopers & Lybrand, and Goldman Sachs, as well as the British government. This replenishment was limited and also supported by a surplus in the printers' fund, which was taken by the government in part payment of £100 million required to support the workers' state pensions. The rest of the £100 million was waived. Maxwell's theft of pension funds was therefore partly repaid from public funds. The result was that in general, pensioners received about half of their company pension entitlement. The Maxwell companies filed for bankruptcy protection in 1992. Kevin Maxwell was declared bankrupt with debts of £400 million. In 1995, Kevin, Ian and two other former directors went on trial for conspiracy to defraud, but were unanimously acquitted by a 12-person jury the following year. Family In November 1994, Maxwell's widow Elisabeth published her memoirs, A Mind of My Own: My Life with Robert Maxwell, which sheds light on her life with him, when the publishing magnate was ranked as one of the richest people in the world. Having earned her degree from Oxford University in 1981, Elisabeth devoted much of her later life to continued research on the Holocaust and worked as a proponent of Jewish-Christian dialogue. She died on 7 August 2013. In July 2020, Maxwell's youngest child, his daughter Ghislaine Maxwell, was arrested and charged in New Hampshire with six federal crimes, involving minors' trade, travel, and seduction to engage in criminal sexual activity, and conspiracy to entice children to engage in illegal sex acts, allegedly linked to a sex trafficking ring with Jeffrey Epstein (who had already