Video Technicians Create a Crime-Solving System
Video Technicians Create a
By Patricia Biggs, The Arizona Republic
Two Chandler police video
technicians have become
across the Valley.
A homicide and a string of
were among the 100 cases
they've worked in the past
several months for
Tempe, Mesa and
Maricopa County as well as for Chandler detectives.
The two men also are part of a federal Homeland Defense Forensic
Video Analysis Response Team, which is on call in the Western
Until a year ago, Jim Schwalenberg and Eddie Burns had been
producing films for police training and the Channel 98 public-safety
Sgt. Mark Franzen, a Chandler police spokesman, said
Schwalenberg "saw the need and the demand" for video forensics in
solving crimes. He pitched the idea, and the department won a
$40,000 grant for a computer system and dTective software program
by Ocean Systems.
"It's an emerging science," Schwalenberg said. "There is a big call
for it, and it'll only get bigger as things advance."
Burns agrees, saying the amount of video evidence available to
detectives continues to grow.
"The average person is on 12 different cameras on any given day,"
Schwalenberg went to training in Maryland, and Burns trained with
the FBI in Quantico, Va.
As the video producers added criminal investigative work to their
daily duties, they had to learn such things as handling evidence
correctly and testifying in court.
"They were instructed on any new policies and procedures so they
could begin being part of our investigative team," Franzen said.
The training has paid off for detectives across the Valley.
After Phoenix manicurist Ha Nu Hoang was found dead in the trunk
of her Honda Accord on Aug. 11 in Scottsdale, homicide detectives
traced her back to Casino Arizona the night of Aug. 8. Scottsdale
Detective Tom Van Meter soon learned there were 400 cameras in
"We just literally tracked them all through the casino, him watching
her all throughout the evening. Once they walked through the door,
then we knew the last time she was last seen alive," Van Meter said.
After watching 50 hours of videotape, he turned to Chandler for
"I knew Chandler had that software," Van Meter said. "You can
isolate images, and things just look better. You can blow them up
without distorting it too bad."
One of the views showed a man following Hoang out of the casino.
A week later, Van Meter had an image clear enough to show on
television. Within four hours of releasing it, Scottsdale police began
hearing from citizens, he said.
Sameh Basta called from New York to ask why his picture was
being circulated. Within days, Scottsdale police arrested him.
Basta was indicted Oct. 6 on charges of first-degree murder and
"I give Chandler credit," Van Meter said. "They seem to be pretty
much on top of the new technology."
The Chandler technicians helped their own detectives solve a string
of East Valley burglaries after a surveillance tape inside a
Blockbuster Video showed two men lifting merchandise.
The 30-second video was grainy, with quickly flashing images
compressed in alternating frames. Burns copied it as a digital
recording and sent the tape back to the evidence room to preserve it.
Then he went to work on the digital images, picking them apart.
"We use a series of filters to change pixel shapes without changing
images," Burns said. "Is that a scar, a mole or an artifact on the tape?
We look for consistencies."
Even such things as the emblem on the hood of a car or the pattern
headlights make on asphalt have been useful, he said.
Although one of the burglary suspects wore plain dark clothing and a
cap, the techs were able to get an identifiable image of both men.
After four days, Burns had 12 images to send to detectives.
"When our work is done here, the detectives' work is just starting,"