There is no available evidence from the provided sources to confirm or refute Gov. Cox's statement about the roommate being a romantic partner transitioning from male to female and cooperating with investigators.
Gov. Cox: "The roommate was a romantic partner, a male transitioning to female...This partner has been incredibly cooperative, had no idea this was happening, and is working with investigators right now."

FactVerify
Source: factverify.com
Key Evidence
No sources were provided in the search results to support or challenge the statement made by Gov. Cox regarding the roommate's identity and cooperation status.
What the Evidence Shows
The input is a direct quote attributed to Gov. Cox describing the identity and cooperation of a roommate involved in an investigation.
However, the search results provided contain no sources or information that corroborate or dispute this claim. Without independent, reliable sources such as official statements, news reports, or investigative documents, it is impossible to verify the accuracy of this statement. The lack of any supporting evidence means the claim remains unverified.
Additionally, sensitive personal details about individuals involved in investigations require careful confirmation from trustworthy sources before acceptance.