Thurston County Sheriff’s Office, documents related to their investigation into William Earl Cosden Jr., Part Three.
This is the second installments of documents from the Thurston County Sheriff’s Department related to William Cosden Jr.
The third installment of documents from the Thurston County Sheriff’s Department related to the murder of Brenda Joy Baker from Maple Valley, WA.
The second installment of documents from the Thurston County Sheriff’s Department related to the murder of Brenda Joy Baker from Maple Valley, WA.
I requested the case files for the murders of Katherine Merry Devine and Brenda Joy Baker from the Thurston County Sheriff’s Department and thought, why not ask for William Cosden Jr.’s as well? This is the first installment of those documents. There’s also a 2.3 gigabyte video they gave me as well, I have to figure out a way to get that on here.




















I was always under the impression that LE were unable to give out information related to unsolved cases, so when I requested the case files for the murder of Brenda Joy Baker I wasn’t expecting much. This is the first installment of records that the Thurston County Sheriff’s are sending me.
Once they were officially released the Thurston County Sheriff’s were super quick with getting me the second installment of files related to the murder of Katherine Merry Devine (I think they sent them before I even paid). There’s about 30 ‘tif’ files that look like newspaper articles, I’m having problems uploading them (as well as a 31 minute video) but once I figure it out I’ll attach them.

In late April 2024 I requested the files related to the murder of Kathy Devine from the Thurston County Sherrif’s department in Washington state, and they finally got around to getting them to me at the end of June. I shouldn’t be so salty, I’m very thankful they were willing to send them to me. Included in the information was a bunch of newspaper articles about Kathy, and I almost didn’t include them because most of them I found on newspapers.com (and are in my article), but it was important that I release Kathy’s case file in it’s entirety. They did tell me that sometime in August additional information will be ‘made available’ so… that’s also exciting.