Will ankle monitor prove Chad Holley's innocence?

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Chad Holley was 15 years old in 2010 when a surveillance camera captured Houston officers beating him. Fast forward to December 2016 and he has been charged with capital murder. During Holley's first court appearance on that charge, prosecutors say an eyewitness is pointing the finger at Holley, saying that the now 22-year-old man had robbed, shot and killed 42-year-old David Trejo Gonzalez in September 2016 as Gonzalez returned to his apartment unit on East Crosstimbers Street, but is there more crucial evidence proving otherwise?

Civil rights activist Quanell X, who appeared at Holley's arraignment hearing, says Holley was wearing a GPS ankle monitor which will prove he is not the man who murdered Gonzalez.

"An eyewitness is one thing, but sometimes eyewitness testimony can be unreliable," explains Quanell X. "I would have thought by now they would have had the ankle monitor analyzed to see exactly where Mr. Holley was. What I want to see? The results of the ankle monitor GPS system.”

Holley was ordered as part of his probation in 2013 to wear a GPS monitoring device for seven years, according to court documents.

Shaun Burns with EZ Monitoring, a company that is contracted to monitor GPS tracking systems for offenders who are on probation in Harris County, says that while the old house arrest devices would only monitor violations, the newer GPS ankle monitoring systems are very accurate, constantly recording and can track someone within two feet of where they stand.

“The device takes one point a minute so every minute they’re wearing it, it records a location," explains Burns. "We’re able to go back as long as they’ve had the device. We’re able to review the data for as long as they’ve had the device...There’s an infrared beam fiber optic cable that runs through the ankle band if it’s broken it immediately knows the strap has been tampered with.”

“This person we’re watching right here is staying at home so the system zooms in enough so you can see him moving around the house and yard,” says Shannon Pena with EZ Monitoring as she demonstrates on a computer screen. ”We tell people all the time this can hurt you or it can help you. If you’re not doing what you’re supposed to be doing, we’re going to have all the evidence to back that up, but if you are doing what you’re supposed to be doing and somebody alleges something that’s false and there have been a few instances where we have been able to help people clear their name.”

While EZ Monitoring is contracted with the Harris County Probation Department to track offenders who are on probation, they do not track Chad Holley. The company just this week helped clear a man who was charged with a crime but his GPS tracking system showed otherwise. EZ Monitoring also recently helped prove a criminal case against a robbery suspect. Either way, Holley's GPS tracking system should reveal exactly where he was on Sept. 21, 2016 when David Gonzalez was murdered but that monitoring information hasn't yet been released.

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