A local Colorado State Patrol trooper is out of a job after an investigation reveals he has not been "entirely truthful" in reports. An internal investigation by the CSP concluded that Trooper Don Moseman was biased during DUI investigations. Although it still isn't clear exactly how his reports were falsified, DUI defense attorney Andrew Nolan tells NewsChannel 5 his clients would claim that roadside tests that were in reports by Moseman were never even done.

Assistant District Attorney Rich Tuttle says Moseman has worked for the CSP since 1997, in both the Grand Junction and Denver areas.

"In fall of this year our office developed a concern about the quality and consistencies about the investigations being done by Trooper Moseman," said Tuttle.

The CSP then conducted an investigation into the trooper's DUI cases. According to a letter written by CSP Major Barry Bratt to District Attorney Pete Hautzinger, the investigation found that Moseman's reports weren't "entirely truthful" and contained wrong or conflicting information. Neither the CSP nor the District Attorney's office will elaborate on how the trooper was untruthful.

"There were inconsistencies in the reports and things that didn't necessarily make sense to us," said Tuttle.

While Trooper Moseman lost his job, there are larger repercussions.

"It's a big mess," said defense attorney Steve Laiche.

Defense attorneys like Laiche are now going through their cases to see if there are any that Trooper Moseman worked on that need to be reviewed.

"We're going to have to start culling our files to see what has happened for the last 15 years," said Laiche.

The DA's office is also going through cases to look for discrepancies.

"We are looking back in time to 1998. I'm taking a hard look at those cases that he might have been involved in," said Tuttle.

Tuttle says the public needs to know that there are checks and balances for law enforcement.

"When we have concerns about the integrity of an investigation or the integrity of an individual officer we address those concerns," said Tuttle.

But Laiche says the public's confidence in the system may waiver.

"We want to believe these people are telling the truth. We want to believe these people are protecting us, and when they don't do that, it puts our entire system at risk," said Laiche.

Nolan says he's had three active cases tied to Trooper Moseman dismissed in the past few days.

Trooper Moseman stopped working for the CSP on December 1st.