Sheriff's Office arrests 24-year-old man on multiple rape charges; additional victims sought
Clackamas County Sheriff's Office
On Thursday, January 29, 2026, detectives from the Clackamas County Sheriff’s Office arrested Jacob Todd Koser, age 24, of Oak Grove on multiple counts of Rape in the First Degree, Strangulation, Assault in the Fourth Degree, and Menacing, along with additional counts of Providing Liquor to a Person Under 21 or to an Intoxicated Person and Unlawful Delivery of Marijuana.
During the investigation, detectives learned Koser met the adult female victim through the mobile dating application Tinder. Investigators believe he may have also used the dating application Pure.
Koser is being held in the Clackamas County Jail on a $500,000 bail.
We are releasing Jacob Koser’s booking photo from this incident. The release of the booking photo is for law enforcement purposes and is in accordance with Oregon House Bill 3273 for the identification of additional criminal activity.
ADDITIONAL VICTIMS SOUGHT: This investigation is ongoing, and detectives are concerned Koser may have additional victims.
Anyone with information about criminal activity by Jacob Koser or possible additional victims is urged to contact the Sheriff’s Office Tip Line -- by phone at 503-723-4949 or by using the online email form at: http://www.clackamas.us/
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