HILLSBORO, Ore.- On June 10, 2020, Aaron Cooper Zepeda pleaded guilty to second-degree assault and was sentenced to 70 months in prison by Judge Oscar Garcia. Deputy District Attorney Will Stabler prosecuted the case against Mr. Zepeda.

On September 10, 2019, the defendant was intoxicated and driving with a friend in Beaverton, Oregon. He repeatedly told the friend he wanted to “stick” someone before he arrived at a convenience store. When he arrived at the business, he identified a random person and began arguing with the stranger as the victim entered the building. Mr. Zepeda then followed the victim into the business and continued to harass him. At one point the defendant got into the victim’s personal space, prompting the victim to shove him away. Mr. Zepeda then pulled what appeared to be a pocketknife and stabbed the victim in the torso.

Store employees quickly pushed Mr. Zepeda out of the building and called police. The defendant fled the area and was able to elude authorities.

Beaverton Police obtained surveillance photos from the business and sent them to the Washington County Probation and Parole Department. Two parole officers immediately identified Mr. Zepeda as the attacker that night. Police then obtained a search warrant for the defendant’s home and collected evidence including clothing worn during the attack. Mr. Zepeda admitted to being at the business but denied intentionally stabbing the victim.

The Washington County District Attorney’s Office acknowledges the work of the Beaverton Police Department and that of the Washington County Probation and Parole Department on this case.

In addition to his prison sentence, Judge Garcia also ordered the defendant to undergo three years of post-prison supervision upon his release. Mr. Zepeda will be transferred to the Oregon Department of Corrections to begin serving his sentence.

Media contact information
Stephen Mayer
Public Information Officer
971-708-8219

HILLSBORO, ORE.- On June 15, 2020, Caden Joseph Hall pleaded guilty to second-degree robbery. Judge Rebecca Guptill then sentenced Mr. Hall to 55 months in prison. Deputy District Attorney Sara Loebner prosecuted the case against the defendant.

On April 22, 2020, the defendant went to a Beaverton, Oregon Fred Meyer location with the intent to commit theft. A loss prevention officer immediately recognized the defendant as the same person who stole items from the store just two days earlier. She identified herself as a store employee and ordered Mr. Hall to leave the building. The defendant then made a threatening comment that he had a knife and proceeded to use a tool to cut a security cable on a portable speaker and left the store without paying for the item.

The loss prevention officer followed the defendant to the parking lot where she was able to flag down a Washington County Sheriff’s Deputy. The deputy then confronted Mr. Hall and found he had several items hidden in his clothing including the stolen speaker. Mr. Hall admitted the speaker was stolen but told the deputy he believed he could not be arrested due to the nature of the crime and the ongoing crisis surrounding COVID-19. He was in fact arrested and lodged at the Washington County Jail.

Investigators then linked the defendant to two additional theft cases committed during Governor Kate Brown’s state of emergency declaration. The defendant has a history of other property crimes including theft, robbery, and unlawful entry into a motor vehicle.

The Washington County District Attorney’s Office is dedicated to protecting our community and its businesses, especially as COVID-19 continues to present a hardship to companies large and small. In early May, District Attorney Kevin Barton issued this statement alerting the public to concerns that criminals may be looking to take advantage of the crisis. This office hopes this case serves as a reminder that offenders will be held accountable for their actions.

This office would like to acknowledge the work of the Washington County Sheriff’s Office in apprehending Mr. Hall.

In addition to his prison sentence, Mr. Hall was also ordered to undergo three years of post-prison supervision upon his release. He will be transferred to the Oregon Department of Corrections to begin serving his sentence.

Media contact information
Stephen Mayer
Public Information Officer
971-708-8219

HILLSBORO, ORE.- On June 9, 2020, Michael William Hern pleaded guilty to first-degree rape, two counts of first-degree unlawful sexual penetration and two counts of first-degree sexual abuse. Mr. Hern was then sentenced to 30 years in prison by Judge Beth Roberts. Deputy District Attorney Rayney Meisel prosecuted the case against the defendant.

Allegations of abuse perpetrated by the defendant first came to light in 2005. Mr. Hern denied the allegations at that time and passed a polygraph examination. Charges were not filed.

In 2019, a new victim came forward with similar allegations of abuse. This new evidence prompted Detective Cheryl Crecelius of the Washington County Sheriff’s Office to reopen an investigation into the defendant. That investigation uncovered a total of six victims in Washington County who reported the defendant abused them when they were juveniles. The majority of the abuse took place in Washington County, Oregon but also occurred in other areas of the state over a span of 20 years.

“Mr. Hern engaged in a pattern and practice of befriending people with young daughters, gaining their trust and then gaining access to their children. His predatory behavior spans over two decades and only stopped when the world began to listen to the voices of these survivors, some of whom are now young women,” said DDA Meisel.

The Washington County District Attorney’s Office acknowledges the bravery of the survivors who came forward to tell their stories. This office also commends the work of law enforcement including Detective Crecelius, Detective Todd Steele of the Yamhill County Sheriff’s Office and Oregon State Police.

Mr. Hern will be transported to Yamhill County, Oregon where he is expected to plead guilty to additional charges related to the abuse of a seventh victim. Mr. Hern also has ties to Josephine County, Oregon as well as other areas of Oregon. Investigators fear there could be other victims who have not yet come forward. Anyone with information about crimes committed by Mr. Hern should contact local law enforcement or the Washington County Sheriff’s Office immediately.

Media contact information
Stephen Mayer
Public Information Officer
971-708-8219

HILLSBORO, Ore.- On June 5, 2020 a Washington County grand jury indicted Washington County Jail Deputy Rian Alden on one count of Official Misconduct in the First Degree concerning a use of force incident that occurred in the jail in 2018.

This incident was investigated by the Multnomah County Sheriff’s Office and the Oregon State Police in 2018.  At that time and based on the known evidence, charges were not filed. New evidence recently became known which prompted a re-opening of the investigation and this indictment.

Pursuant to ORPC 3.6, the Washington County District Attorney’s Office cannot comment further on this case as it has not yet been adjudicated.

Media contact information
Stephen Mayer
Public Information Officer
971-708-8219

HILLSBORO, Ore.- On May 28, 2020, a Washington County jury found Jose Luis Nava-Diaz guilty of unlawful delivery of methamphetamine and unlawful possession of methamphetamine. On June 1, 2020, Judge Eric Butterfield sentenced the defendant to 115 months in prison. Deputy District Attorney Jason Ring prosecuted the case against Mr. Nava-Diaz.

On January 23, 2020, the defendant was stopped by deputies with the Washington County Sheriff’s Office as he exited a vehicle at the Elmonica MAX Station in Beaverton, Oregon. Investigators with the Westside Interagency Narcotics Team (WIN) identified the defendant as being involved in the illegal distribution of narcotics. Deputies located approximately six pounds of methamphetamine and drug paraphernalia during their search. The defendant was then taken into custody.

Investigators subsequently obtained a search warrant for the defendant’s home. There they found an additional four ounces of methamphetamine.

The Washington County District Attorney’s Office acknowledges the work of the WIN team and the Washington County Sheriff’s Office on this case.

Mr. Nava-Diaz will be transferred to the Oregon Department of Corrections to begin serving his sentence.

Media contact information
Stephen Mayer
Public Information Officer
971-708-8219

HILLSBORO, Ore.- On June 3, 2020, Kaliq Michael Mansor pleaded guilty to manslaughter in the first degree, assault in the first degree, and criminal mistreatment in the first degree. Judge Oscar Garcia then sentenced the defendant to 27 ½ years in prison. District Attorney Kevin Barton and Senior Deputy District Attorney John Gerhard prosecuted the case against Mr. Mansor.

In 2012, the defendant was convicted on multiple charges and sentenced to life in prison with a minimum of 27 years for his role in the death of his infant son. In 2018, the Oregon Supreme Court overturned that conviction citing concerns with a search warrant executed on the defendant’s computer. That decision led to this second trial which was scheduled to begin this fall until the defendant opted to plead guilty to the above charges.

On June 12, 2011, Mr. Mansor called 9-1-1 to report his infant child was not breathing. The boy was rushed to the hospital but was declared brain dead the following day. Subsequent medical evaluation on that child and another child under the defendant’s care uncovered a history of abuse.

Mr. Mansor told investigators that he was home alone with the children when one of them began to choke while the defendant was feeding him. Mr. Mansor said he then shook the child and smacked his back in an effort to clear his breathing way. He reported the child’s breathing became very labored but waited an additional 15 minutes before calling for help.

Investigators obtained a search warrant for the defendant’s computer. Internet search history unveiled queries including, “how do I stop abusing my baby” and “how do I keep from losing my temper.” After this initial search warrant was ultimately deemed insufficient, investigators sought and obtained a second search warrant for the device in preparation for a new trial.

The Washington County District Attorney’s Office acknowledges the Washington County Sheriff’s Office including Detective Robert Rookhuyzen, CARES Northwest and medical personnel for their work on this case.

In addition to his prison sentence, the defendant will also undergo more than twelve years of post-prison supervision upon his release. The defendant will be transferred to the Oregon Department of Corrections to begin serving his sentence.

If you know of a child suffering abuse, report it immediately by calling 9-1-1. You can also report your concerns to the Oregon Child Abuse Hotline by calling 1-855-503-SAFE.

The victim’s mother also provided this statement.

Media contact information
Stephen Mayer
Public Information Officer
971-708-8219

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