Cowlitz Co. Sheriff's Office
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News Release
Update #3: Murder suspect arrested: Cowlitz Sheriff / Coroner releases ID of victim found in Coweenman River - 02/11/17

Update #3: February 11 2017. Cowlitz and Thurston County Sheriff detectives arrested 20 year old Jeremy B Leiniger late last night for the murder of Clark Calquhoun. The arrest was a result of tireless efforts of detectives from both agencies who have been on the case every day since the victim was found in the Coweeman River.

Leiniger who is a Castle Rock resident was booked for Murder in the 1st degree in Thurston County late last night.

Because the case is on going neither agency will be releasing additional details such as the motive, or the location of the crime or whether or not other arrest are expected.

Previous media releases below.

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Update: #2 The Cowlitz Sheriff's Office and Cornoer's Office is releasing this additional information about the victim found in the Coweeman River.

Here is the report from Coroner Tim Davidson...

"Longview, WA. The Cowlitz County Coroner's Office has scientifically confirmed the identification of the body recovered from the Coweeman River, Kelso, WA on January 28, 2017.
The person recovered is identified as 53-year old, Clark Edward Calquhoun, currently listed as a Rainier, WA resident. Mr. Calquhoun had been listed as a missing person out Thurston County since January 6, 2017 having been last seen on December 28, 2016.

An investigation and autopsy was conducted by the Cowlitz County Coroner's Office. The primary Cause of Death is Gunshot Wounds. The Manner of Death is list as Homicide. This is an active investigation and as such no further information will be released at this time.

Any questions pertaining to the cause and manner of death can be directed to the Cowlitz County Coroner Dr. Timothy Davidson at 360-577-3079. The Coroner's independent investigation into the decedent's identity and the cause and manner of death does not conclude the investigation of the Cowlitz County Sheriff's Office, questions regarding their investigation should be directed to Chief Criminal Deputy Charlie Rosenzweig at 360-577-3092...."

Information from Cowlitz Sheriff Chief Criminal Deputy Charlie Rosenzweig...

" Detectives have been working an extensive numbers of hours every day since this victim was discovered. They have collected a lot of evidence and interviewed several associates of the victim. They have been working with the Thurston County Sheriff Detectives who already had a missing persons investigation underway since Mr. Calquhoun was reported missing. Detectives will continue to work hard on this case and they are encouraging anyone who has any information to call Cowlitz Detective Sergeant Brad Thurman at (360) 577-3092.

We will not be releasing additional details about the nature of Mr Calquhouns death. We are not stating whether we have or do not have people who are "persons of interest".

CCD Rosenzweig

Previous releases listed below.--------------------

Update #1: Sunday Jan 29th 7:00 p.m.

Detectives have finished processing the scene today. They were assisted by 8 members of the Cowlitz County Search and Rescue volunteer group. The efforts by the detectives and volunteers included collecting a few items from the area that look like they may be related to the investigation. The process also included photographing the scene with the Sheriff's Office newly acquired drone. This proved very valuable as it allowed detectives to photograph the scene from above the river and trees which would otherwise be very difficult if not impossible.

The Coroner has tentatively scheduled the autopsy for mid week, maybe Wednesday.

We are not releasing additional details at this time.

Anyone who has information regarding this case is encouraged to call the Sheriff's Office and ask to leave a message for the detectives.

Callers can text a tip anonymously to us by downloading the TIP411 app on their smart phone and make it attention to the Cowlitz County Sheriff's Office.

CCD Charlie Rosenzweig

Previous release listed below----------------------------------------

Cowlitz County: Kelso, Washington Sunday January 29th 2017

Cowlitz Sheriff Detectives are investigating a death of a suspicious nature. The investigation began yesterday afternoon when some people found an adult man's body in the Coweeman River several miles past the end of Rose Valley road. Detectives and the coroner responded and the victim was recovered. This is roughly 15 miles east of Kelso, Washington.

We are not ready to release more details about this case at this time. More information will be released as it becomes available.

I appreciate the media has lots of questions to ask such as the nature of the death, the ID of the victim, etc. Please be patient and we will release those as soon as possible. I will not be available for calls before 2pm due to the remote location of the scene.

Charlie Rosenzweig
Chief Criminal Deputy.