11 April 2010 :
Cass County District Judge Randall Rehmeier has convicted Douglas County's chief crime-scene investigator, David Kofoed, on an evidence tampering charge. Kofoed's sentencing date is set for May 10th. He is facing a maximum sentence of 5 years in prison. Kofoed stood trial last week in Cass County where he investigated a double murder in 2006. Kofoed said he found a speck of a victim's blood in a car linked to two suspects. Prosecutors argue he planted or manufactured the evidence to bolster a case against the two men, who were later cleared of murder charges. Kofoed's attorney argued accidental cross-contamination, not sinister motives, explains how his client's test came up positive while searching the car for blood evidence. Kofoed's work came into question after an investigation into the April 17, 2006 murder of Wayne and Sharmon Stock. Early on, the police honed in on Matt Livers and Nick Sampson, cousins of the slain couple. During a heated interrogation, Cass County Sheriff's Investigator Earl Schenk told the mentally-handicapped Livers that unless he confessed, Schenk would do everything in his power to be sure Livers was executed, threatening to "do my best to hang your ass from the highest tree." Livers eventually confessed, implicating himself and Sampson. Livers retracted his confession the next day. Cass County investigators then called in David Kofoed, commander of the Crime Scene Investigation unit for Nebraska's Douglas County who, the day later, claimed to find a drop of blood from one of the victims in a car that was linked to the suspects, though it had already been examined by another forensic investigator. The two suspects were charged with murder. That and Livers' confession could well have resulted in a death sentence for Livers and Sampson. Except that days after Kofoed found the incriminating speck of blood, two Wisconsin teenagers were arrested for the Stocks' murders. They had no tie to Livers and Sampson. And their car was crawling with the Stocks' DNA. In June 2006, both Reid and Fester confessed to killing the Stocks. Overwhelming evidence proved Reid and Fester to be guilty of murder; however, police officers did not drop charges against Livers and Sampson. Officers attempted to cover their tracks by fabricating additional evidence against Livers and Sampson. They attempted to coerce and manipulate Reid, Fester and at least one other witness into implicating Livers and Sampson as co-conspirators in the murders. Finally, on December 6, 2006, the Cass County Attorney dismissed the case against Livers after a State expert found that the officers had used psychological coercion to illicit a confession from a mildly retarded person and that, as a result, the confession was not reliable and could not be used as evidence. Livers and Sampson were released after 7 month in prison. On March 15, 2007 Gregory Fester and Jessica Reid, after pleading guilty to the crimes, have been both sentenced to serve 2 consecutive life sentences. An internal investigation cleared Kofoed and his unit of any wrongdoing. But the FBI conducted its own investigation. Kofoed himself told the
World-Herald that FBI agents told him his explanations for how one victim's blood ended up in the ultimately vindicated suspects' car "didn't pass the smell test." According to the Omaha World-Herald, Kofoed was an active self-promoter, making his CSI unit available to other police agencies in Nebraska around the clock. His unit has contracts with 45 police agencies in Nebraska and Iowa. The case has been followed by The Roderick MacArthur Justice Center and the Center on Wrongful Convictions, both located in Chicago at Northwestern University. Other states have also experienced problems with evidence presented in criminal investigations, raising concerns that even scientific evidence can be misleading if mishandled. In Harris County, Texas, four prisoners' convictions were overturned because of faulty work by the Houston crime lab. A 2002 audit found that technicians were poorly trained, kept bad records and had misread data. In San Francisco, prosecutors dismissed more than 250 drug cases because of accusations of evidence tampering in the city's crime lab.
(Sources: World-Herald, Associated Press, 23/03/2010)