In the UK in 1989 it was estimated that solicitors made mistakes in more than 50% of the divorce case petitions filed in some courts. Error rates of up to 32% occurred in issuing summonses or applications to start legal proceedings, 23% in warrants of execution, and 39% in written evidence supporting divorce petitions. Of 55,000 complaints from the public, 25% were concerned with delays, 15% were of negligence, 10% about overcharging, and 9% alleged shoddy work. In 1992 a series of miscarriages of justice caused by police fabrication of evidence or perjuring themselves had revealed a culture of institutional corruption with some 800 possible cases requiring further investigation.In 1996 in the USA, three men, who had spent 18 years in prison for a double murder they did not commit, had chrages dropped against them and were released.