During the original 6 month lease, the owner saw mold and water damage around a sink and wanted to repair it. He offered to pay for a hotel for a few days to allow for the repair. Tenant refused to allow the repair, and apparently the issue kept getting worse. Tenant didn’t want to allow for the repair until their lease was up. When the lease ended tenant let them stay for a few additional weeks, which was probably their big mistake here. Then when they still wouldn’t leave he called the housing inspector to start eviction proceedings. The housing inspector noted the lack of occupancy license, and an out of code shower. At that point the owner ended up in a catch 22. He could not file for eviction until place was up to code, but the tenant prevented any attempts to access the shower to bring it up to code.
Maybe there’s more to this too, that’s all just from the article above, but it sounds like there’s multiple sides to the story.