MULTNOMAH COUNTY, Ore. (MCSO) – Deputies with the Multnomah County Sheriff’s Office (MCSO) have arrested a 30-year-old felon accused of being in unlawful possession of a firearm and a stolen pickup.  

Just before 10 p.m. on Sunday, October 19, 2025, a MCSO deputy saw a pickup parked at a closed gas station near 521 Southwest Halsey Street in Troutdale.  The deputy ran the pickup’s license plate and learned the vehicle was wanted in connection with a possible robbery out of Umatilla County. Deputies also learned a firearm was taken during the initial incident.  

The vehicle left the area before the MCSO deputy could conduct a traffic stop. However, the deputy immediately shared information about the pickup’s last known location with other patrol deputies and nearby agencies.  

Around 10:30 p.m., a separate MCSO deputy found the pickup parked at another gas station near 2533 Southwest Cherry Park Road. MCSO deputies and Gresham Police Department officers set up containment in the area, blocking off potential exits to the parking lot.  

Once deputies locked the area down, they approached the pickup and began giving the person inside instructions.  
The person inside, later identified as 30-year-old Jacob Richard Mack, initially refused to cooperate with the orders to exit the pickup.  

After multiple use of force warnings, deputies used a less-lethal projectile device to create better sightlines into the pickup for officer safety and to gain Mack’s compliance.  

The tactical planning had the desired outcome with Mack eventually exiting the truck without any further incident.  

There were no reported injuries.  

During the investigation, deputies recovered a firearm from the pickup.  

Deputies booked Mack into the Multnomah County Detention Center on charges that include: 

• Unlawful possession of a motor vehicle
• First-degree theft
• Felon in possession of a firearm
• Possession of a stolen motor vehicle 

Charges are only allegations, and every arrested person is presumed innocent unless and until proven guilty beyond a reasonable doubt. 

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. 

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