PRESS RELEASE #2
A22-5242 – HOMICIDE INVESTIGATION
NOVEMBER 10, 2022
On November 9, 2022, detectives with the Cowlitz County Sheriff’s Office served a
search warrant on a property in Oakville, Washington, related to the investigation of the
death of Alan Brice Nielsen, age 51, of Kelso. Detectives were assisted by the Sheriff’s
Office Crime Reduction Team, with additional assistance from the Grays Harbor County
Sheriff’s Office and the Aberdeen Police Department.
Detectives located Jerome Adrian Markert, age 47, of Kelso and placed him under arrest.
Detectives had identified Markert as a second suspect in the murder of Alan Nielsen.
Markert was booked into Cowlitz County Jail on charges of Murder 1st Degree,
Explosives Devices – Prohibited, and Unlawful Disposal of Human Remains. An
additional charge of Unlawful Possession of Firearm 2nd Degree was added after
detectives recovered a firearm during the service of the search warrant in Oakville.
This investigation is ongoing and further details are not available at this time. The
Sheriff’s Office requests anyone with information about this investigation contact
Detective Troy Lee at 360-577-3092.