Multnomah County Sheriff’s Office, U.S. Marshals Service Arrest Suspect In 2025 Child Murder Investigation - 06/10/26
MULTNOMAH COUNTY – Detectives with the Multnomah County Sheriff’s Office, with the assistance of the United State Marshals Pacific Northwest Violent Offender Task Force, have arrested a 28-year-old man who is accused of murdering his girlfriend’s two-year-old child.
Detectives booked Dison Ruda into the Multnomah County Detention Center on charges of Murder in the Second Degree, Assault in the First Degree, Assault in the Third Degree, and two counts of Criminal Mistreatment in the First Degree.
This investigation began at 11:47 a.m. on March 28, 2025, when Multnomah County Sheriff’s deputies responded to Blue Lake Park located at 20500 Northeast Marine Drive in Fairview, Oregon on reports of a man carrying an unresponsive child.
Deputies arrived and found a two-year-old girl unconscious and not breathing.
Detectives with the Multnomah County Sheriff’s Office and East County Major Crimes Team immediately began investigating the case based on the suspicious circumstances involving this child’s death.
On March 16, 2026, the Oregon State Medical Examiner’s Office determine the cause of death to be homicide.
Detectives worked with the Multnomah County District Attorney’s Office to get a court-authorized arrest warrant for Ruda.
On Wednesday, June 10, 2026, deputies and the U.S. Marshals Pacific Northwest Violent Offender Task Force located Ruda around 6 a.m. and arrested him near Southeast 92nd Avenue and Southeast Powell Boulevard in Portland, Oregon.
"This arrest represents months of investigative work and a collaborative effort between the Multnomah County Sheriff’s Office and our essential public safety and medical partners,” said Multnomah County Sheriff Nicole Morrisey O’Donnell. “An investigation of this magnitude requires significant resources and specialized investigative training and expertise. I want to recognize the exceptional dedication of our detectives, the East County Major Crimes Team, the Multnomah County District Attorney’s Office, the U.S. Marshals Service, the Oregon State Police Crime Lab, and the specialized clinical staff at CARES Northwest and Randall Children's Hospital at Legacy Emanuel. Complex investigations like this highlight exactly why countywide law enforcement capabilities are indispensable.”
Ruda is scheduled to make his first court appearance at 9 a.m. on Thursday, June 11, 2026 in Courtroom #3 at the Multnomah County Justice Center.
Charges are only allegations, and every arrested person is presumed innocent unless and until proven guilty beyond a reasonable doubt.
ORS 133.870 generally prohibits the release of jail booking photos to the public unless it is determined that there is a law enforcement purpose.
The information contained in this news release is based on a preliminary review of the details available to the Multnomah County Sheriff’s Office. As the investigation progresses, information may change.
Note: Out of respect for the child’s family and to maintain their right to privacy during this time, the Multnomah County Sheriff’s Office is withholding the child's name from our public communications. We recognize that her identity will formally enter the public record during the defendant’s upcoming arraignment. However, our priority is to provide her family with the opportunity to mourn privately before the judicial process begins.
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