Digital child photos, problems for prosecution
NEW YORK (AP) - February 25, 2008 They are sent by police and prosecutors who hope Collins and her
11 analysts at the National Center for Missing and Exploited
Children can verify that the graphic pictures are real, not
computer-generated. When they can't, officials sometimes turn to
outside experts.
All this is being done - at an annual cost in the millions of
dollars collectively in child-pornography cases alone - as software
like Photoshop makes it easier to fake photos and as juries become
more skeptical about what they see.
Although challenges to digital photos come in all types of
criminal and civil cases, they are especially pronounced in
child-pornography cases because of a 2002 U.S. Supreme Court
decision striking down a ban on computer-generated child
pornography. Defense attorneys are trying to use the ruling to
introduce reasonable doubt in jurors' minds about the images'
authenticity.
Prosecutors still generally prevail, but "this has certainly
created an additional burden," said Thomas Kerle of the
Massachusetts State Police. "I can say that unequivocally, it has
made the prosecution of these types of cases more difficult. It
takes ... resources I think could be better applied to
investigating" more cases.
Drew Oosterbaan, who heads the U.S. Department of Justice's
Child Exploitation and Obscenity Section, said prosecutors
sometimes submit only photos they can easily verify because outside
experts can be expensive - with travel, hotels and consulting fees,
along with possible delays.
"This can affect the sentence the defendant gets," he said.
"Before (the 2002 ruling) we would generally charge all the
images."
Oosterbaan added that although defense lawyers have the right -
and duty - to challenge evidence, they are doing so without "any
shred of evidence there are wholly computer-generated images being
generally circulated and passed off as real children out there."
And many law-enforcement officials worry that the time and money
needed to withstand any challenges will only grow as technology
improves and makes it more difficult to tell a computer-generated
image from a real one.
"I feel that pretty much we can tell the difference right
now," said Karl Youngblood of the Alabama Bureau of Investigation.
"How much longer that's going to last, I don't know with the
technology going at the rate it's going."
Of course, there's a cost to defendants as well - sometimes more
so because federal law limits where and when the defense may review
images to restrict their distribution, meaning experts must often
travel with expensive equipment to a police lab in another city.
"If something becomes more difficult for the government to
prove, so be it. They have the burden of proof," said First
Amendment lawyer Louis Sirkin, lead counsel in the challenge that
led to the 2002 Supreme Court ruling.
Child pornography is illegal in the United States, but the
Supreme Court in 2002 struck down on free-speech grounds a 1996
federal ban on material that "appears to be" a child in a
sexually explicit situation. That ruling covers computer-generated
images, though morphing - such as the grafting of a child's school
picture onto a naked body - remains illegal.
Collins' Child Victim Identification Program in Alexandria, Va.,
grew out of that ruling. After officials submit seized photos, the
center uses software and visual inspections to look for matches. It
can usually verify that children in some or all of the images are
known and real.
The program, which costs about $1 million a year to run, now has
about 1,300 children in its database, up from 20 in 2002. Staff
grew from just Collins then to 11 full-time analysts who now work
under her. The program reviewed 5 million images last year, up from
about 450,000 in 2003, the program's first full year.
Because of the graphic nature of the images, a psychologist
visits each week, and analysts must undergo counseling at least
quarterly.
"Not everybody can do it," said Raymond Smith, a longtime
investigator who oversees child-exploitation cases at the U.S.
Postal Inspection Service. "You have to be able to come to grips
with seeing children be victimized and abused. It can tear you up,
(but) through your efforts you are identifying the people that hurt
these children."
When the center cannot make a match, prosecutors can turn to
outside experts. Sometimes, it's a pediatrician who can say a real
child has characteristics matching those seen in the photo. Other
times it's a computer expert who can talk about how difficult it is
to produce images and video of that quality.
Hany Farid, a Dartmouth College professor who has testified for
the prosecution in some cases, said he has been getting more
inquiries about authenticity - not only for child-pornography cases
but also civil lawsuits questioning medical images in malpractice
cases or signatures in contract disputes. News organizations have
also looking for ways to authenticate photos.
"Because so many people get photographic fakes in their
(electronic) mailboxes, to the average juror it resonates," he
said.
The challenges can be costly, even if a case never goes to trial
- the majority end in plea agreements.
Farid said he charges up to $25,000 a year for software he
produced to look for signs of tampering, such as inconsistencies in
shadows. He also charges as much as tens of thousands of dollars to
work on a case.
Even when there is a match and an expert isn't needed, a
prosecutor must seek out the detective who initially identified a
child for the center. That detective must often be flown in and be
ready to testify if the defense raises a challenge. In one case in
Portland, Maine, the Russian detective couldn't be reached, so the
prosecutor had to spend $5,000 on an expert anyway. Trials get
postponed if a key witness has a scheduling conflict.
Sam Guiberson, a defense attorney who specializes in technology
and digital evidence, said challenges to evidence are to be
expected, digital or not.
"Every good trial lawyer is always going to subject every part
of his adversary's exhibits to that sort of scrutiny," Guiberson
said.
Kebin Haller, deputy director of the Wyoming Division of
Criminal Investigation, said that in most cases, a large quantity
of images are seized such that enough hold up.
How much proof a prosecutor needs in child-pornography cases can
vary from region to region and even from judge to judge. Recent
federal appellate rulings have eased the burden on prosecutors,
essentially saying that in lieu of definitive evidence, they can
let jurors make up their own minds about whether an image is real
or computer-generated.
Many prosecutors, though, don't want to take that chance and
would rather submit proof.
"It's difficult to prove these are real children," said Mary
Leary, a Catholic University law professor who previously worked on
child-abuse and child-pornography cases. "Is the defense
exploiting this? Absolutely they are."