UPDATE: The Ellis County Attorney said the officer who shot and killed a man on August 18 acted in self defense.

In a media briefing on Thursday, County Attorney Tom Drees said the incident started when Hays Police Sgt. Brandon Hauptman attempted to stop Joseph Weber for expired tags.

A release put out by Drees' office stated Hauptman tried to pull Weber over, but he kept driving and a chase ensued.

Weber eventually stopped in an alley, but refused to get out of the car and obey Sgt. Hauptman's commands while he was trying to arrest him.

Weber then fled to a second location as more officers arrived.

He finally stopped his vehicle in the 2300 block of Timber Driver, where Weber left his vehicle and began running toward a residence.

Drees said Sgt. Hauptman used a sweeping motion to bring down Weber. Weber fell, then Hauptman fell on top of him.

He said Weber continued to disobey Hauptman's commands and tried to grab his gun.

Drees said, "fearing for his life," Hauptman pushed the barrel of his gun into Weber's chest and fired one shot.

"The evidence, the acts, the autopsy, the physical evidence just did not bear any of that out. It's obvious from the video and from the other statements that they were wrestling on the side, down on the concrete sidewalk when this happened," said Drees.

Drees said dash cam video and audio recordings from the incident would not be released. He cited several Kansas statutes pertaining to personal information and the Weber family does not want their family member remembered by those last recorded moments.

Drees said at the time of the incident Weber displayed no outward signs of having a mental illness - which included autism, anxiety disorder, intermediate explosive disorder and mild intellectual disability.

"Again, you have to be careful not to look at all this from 20/20 hindsight," said Drees. "You have to view this based on what the officer knew, what he was confronted with, what information he had from step to step."

Drees said he is working with the Weber to propose legislation that would offer drivers the option - at the time of registration - to indicate whether they have any type of illness or impairment. Drees said that information would then come up or be made available if or when the driver was pulled over.

All questions for the Weber family are being forwarded to their attorney Kenneth Wasserman out of Salina, Kan.

Who is Sgt. Brandon Hauptman

Factfinder 12 looked into the background of Sgt. Brandon Hauptman.

He began working for the Hays Police Department in August 2007.

He graduated from the Kansas Law Enforcement Training Center in December of 2007.

Hauptman serves as a police instructor and supervisor for the department.

He has never been the subject of any disciplinary actions during his career as an officer.

What's next?

So what's next for Sgt. Hauptman?

No criminal charges will be filed, however, investigators will not look to see if any of the department's policies or standards were violated.

The department has asked the Kansas Highway Patrol to review the case.

Sgt. Hauptman will remain on administrative leave during the investigation.

Factfinder 12 is still asking to see the dash cam video of the incident. We are also asking to listen to an audio recording of the event.

We will ask to see the professional standards investigation report when it is complete.

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The Ellis County Attorney will soon release more details on a deadly officer-involved shooting in Hays.

County Attorney Tom Drees says he'll be putting out a media release at 10 a.m. on Thursday

Joseph Weber, 36, was shot and killed by a Hays police officer on Aug. 18.

Several rallies have been held in Hays calling on Drees and the KBI, which is heading up the investigation, to release more information.

Drees said he was waiting on the KBI to complete it's investigation.

Weber's family and friends said he suffered from autism.

Eyewitness News will bring you live coverage of any response from Drees on www.KWCH.com and the KWCH app.