Shadows of doubt on DNA evidence?

An evil prosecutor could do this. I wonder if it has been done in the past. It is interesting to note that no defense attorney [yet] has challenged the efficacy of the laboratories and techniques let alone the crime scene investigators. Errors can occur.

"DNA Evidence Can Be Fabricated, Scientists Show"

by

Andrew Pollack

August 18th, 2009

The New York Times

Scientists in Israel have demonstrated that it is possible to fabricate DNA evidence, undermining the credibility of what has been considered the gold standard of proof in criminal cases.

The scientists fabricated blood and saliva samples containing DNA from a person other than the donor of the blood and saliva. They also showed that if they had access to a DNA profile in a database, they could construct a sample of DNA to match that profile without obtaining any tissue from that person.

“You can just engineer a crime scene,” said Dan Frumkin, lead author of the paper, which has been published online by the journal Forensic Science International: Genetics. “Any biology undergraduate could perform this.”

Dr. Frumkin is a founder of Nucleix, a company based in Tel Aviv that has developed a test to distinguish real DNA samples from fake ones that it hopes to sell to forensics laboratories.

The planting of fabricated DNA evidence at a crime scene is only one implication of the findings. A potential invasion of personal privacy is another.

Using some of the same techniques, it may be possible to scavenge anyone’s DNA from a discarded drinking cup or cigarette butt and turn it into a saliva sample that could be submitted to a genetic testing company that measures ancestry or the risk of getting various diseases. Celebrities might have to fear “genetic paparazzi,” said Gail H. Javitt of the Genetics and Public Policy Center at Johns Hopkins University.

Tania Simoncelli, science adviser to the American Civil Liberties Union, said the findings were worrisome.

“DNA is a lot easier to plant at a crime scene than fingerprints,” she said. “We’re creating a criminal justice system that is increasingly relying on this technology.”

John M. Butler, leader of the human identity testing project at the National Institute of Standards and Technology, said he was “impressed at how well they were able to fabricate the fake DNA profiles.” However, he added, “I think your average criminal wouldn’t be able to do something like that.”

The scientists fabricated DNA samples two ways. One required a real, if tiny, DNA sample, perhaps from a strand of hair or drinking cup. They amplified the tiny sample into a large quantity of DNA using a standard technique called whole genome amplification.

Of course, a drinking cup or piece of hair might itself be left at a crime scene to frame someone, but blood or saliva may be more believable.

The authors of the paper took blood from a woman and centrifuged it to remove the white cells, which contain DNA. To the remaining red cells they added DNA that had been amplified from a man’s hair.

Since red cells do not contain DNA, all of the genetic material in the blood sample was from the man. The authors sent it to a leading American forensics laboratory, which analyzed it as if it were a normal sample of a man’s blood.

The other technique relied on DNA profiles, stored in law enforcement databases as a series of numbers and letters corresponding to variations at 13 spots in a person’s genome.

From a pooled sample of many people’s DNA, the scientists cloned tiny DNA snippets representing the common variants at each spot, creating a library of such snippets. To prepare a DNA sample matching any profile, they just mixed the proper snippets together. They said that a library of 425 different DNA snippets would be enough to cover every conceivable profile.

Nucleix’s test to tell if a sample has been fabricated relies on the fact that amplified DNA — which would be used in either deception — is not methylated, meaning it lacks certain molecules that are attached to the DNA at specific points, usually to inactivate genes.


FBI telling a FIB?

Ivans...FBI's trail of blunders & tragic end

DNA database

"If you haven’t done anything wrong, you have nothing to fear," he said.

This is a matter of concern.

"F.B.I. and States Vastly Expand DNA Databases"

by

Solomon Moore

April 19th, 2009

The New York Times

Law enforcement officials are vastly expanding their collection of DNA to include millions more people who have been arrested or detained but not yet convicted. The move, intended to help solve more crimes, is raising concerns about the privacy of petty offenders and people who are presumed innocent.

Until now, the federal government genetically tracked only convicts. But starting this month, the Federal Bureau of Investigation will join 15 states that collect DNA samples from those awaiting trial and will also collect DNA from detained immigrants — the vanguard of a growing class of genetic registrants.

The F.B.I., with a DNA database of 6.7 million profiles, expects to accelerate its rate of growth from 80,000 new entries a year to 1.2 million by 2012 — a 17-fold increase. F.B.I. officials say they expect DNA processing backlogs — which now stand at more than 500,000 cases — to increase.

Law enforcement officials say that expanding the DNA databanks to include legally innocent people will help solve more violent crimes. They point out that DNA has helped convict thousands of criminals and has exonerated more than 200 wrongfully convicted people.

But criminal justice experts cite Fourth Amendment privacy concerns and worry that the nation is becoming a genetic surveillance society.

"DNA databases were built initially to deal with violent sexual crimes and homicides — a very limited number of crimes," said Harry Levine, a professor of sociology at City University of New York who studies policing trends. "Over time more and more crimes of decreasing severity have been added to the database. Cops and prosecutors like it because it gives everybody more information and creates a new suspect pool."

Courts have generally upheld laws authorizing compulsory collection of DNA from convicts and ex-convicts under supervised release, on the grounds that criminal acts diminish privacy rights.

DNA extraction upon arrest potentially erodes that argument, a recent Congressional study found. "Courts have not fully considered legal implications of recent extensions of DNA-collection to people whom the government has arrested but not tried or convicted," the report said.

Minors are required to provide DNA samples in 35 states upon conviction, and in some states upon arrest. Three juvenile suspects in November filed the only current constitutional challenge against taking DNA at the time of arrest. The judge temporarily stopped DNA collection from the three youths, and the case is continuing.

Sixteen states now take DNA from some who have been found guilty of misdemeanors. In South Carolina in 2007, a court ordered a DNA sample to be taken from a man found guilty of loitering for the purpose of prostitution.

As more police agencies take DNA for a greater variety of lesser and suspected crimes, civil rights advocates say the government’s power is becoming too broadly applied. "What we object to — and what the Constitution prohibits — is the indiscriminate taking of DNA for things like writing an insufficient funds check, shoplifting, drug convictions and other cases where police don't have a need to obtain DNA because it’s not relevant to charges facing them," said Michael Risher, a lawyer for the American Civil Liberties Union.

This year, California began taking DNA upon arrest and expects to nearly double the growth rate of its database, to 390,000 profiles a year from 200,000.

One of those was Brian Roberts, 29, who was awaiting trial for methamphetamine possession. Inside the huge Twin Towers Correctional Facility in Los Angeles last month, Mr. Roberts let a sheriff’s deputy swab the inside of his cheek.

Mr. Roberts's DNA will be translated into a numerical sequence at the F.B.I.'s DNA database, the largest in the world.

The system will search for matches between Mr. Roberts's DNA and other profiles every Monday, from now into the indeterminate future — until one day, perhaps decades hence, Mr. Roberts might leave a drop of blood or semen at some crime scene.

Law enforcement officials say that DNA extraction upon arrest is no different than fingerprinting at routine bookings and that states purge profiles after people are cleared of suspicion. In practice, a number of defense lawyers say this is a laborious process that often involves a court order. (The F.B.I. says it has never received a request to purge a profile from its own database.)

When DNA is taken in error, expunging a profile can be just as difficult. In Pennsylvania, where DNA cannot be taken from juveniles for misdemeanors, Ellyn Sapper, a Philadelphia public defender, has spent weeks trying to expunge the profile of a 14-year-old boy guilty of assault and bicycle theft — his first misdemeanor. "I'm going to have to get a judge's order to make sure that all references to his DNA are gone," she said.

The police say that the potential hazards of genetic surveillance are worth it because it solves crimes and because DNA is more accurate than other physical evidence. "I've watched women go from mug-book to mug-book looking for the man who raped her," said Mitch Morrissey, the Denver district attorney and an advocate for more expansive DNA sampling. "It saves women's lives."

Mr. Morrissey pointed to Britain, which has fewer privacy protections than the United States and has been taking DNA upon arrest for years. It has a population of 61 million — and 4.5 million DNA profiles. "What you find is that about 8 percent of the people commit about 70 percent of your crimes, so if you can get the majority of that community, you don’t have to do more than that," he said.

In the United States, 8 percent of the population would be roughly 24 million people.

Britain may provide a window into America's genetic surveillance future: As of March 2008, 857,000 people in the British database, or about one-fifth, have no current criminal record. In December, the European Court of Human Rights ruled that Britain's practice of collecting DNA profiles from innocent people, including children as young as 10, violated international privacy protections.

Critics are also disturbed by the demographics of DNA databases, and again Britain’s example is instructive. According to a House of Commons report, 27 percent of black people and 42 percent of all black males are genetically registered, compared with 6 percent of white people.

As in Britain, expanding genetic sampling in the United States could exacerbate racial disparities in the criminal justice system, according to Hank Greely, a Stanford University Law School professor who studies the intersection of genetics, policing and race. Mr. Greely estimated that African-Americans, who are about 12 percent of the national population, currently make up 40 percent of the DNA profiles in the federal database, reflective of their prison population. He also expects Latinos, who are about 13 percent of the population and committed 40 percent of last year's federal offenses — nearly half of them immigration crimes, including illegal entry — to dominate DNA databases.

Enforcement officials contend that DNA is blind to race. Federal profiles include little more information than the DNA sequence and the referring police agency. Subjects’ names are usually kept by investigators.

Rock Harmon, a former prosecutor for Alameda County, Calif., and an adviser to crime laboratories, said DNA demographics reflected the criminal population. Even if an innocent man's DNA was included in a genetic database, he said, it would come to nothing without a crime scene sample to match it. "If you haven't done anything wrong, you have nothing to fear," he said.