What happened? (Spoiler alert)

The film festival I viewed this film in had a technical malfunction, and I missed about 10 minutes of the film (the 10 minutes I most wanted to see, probably.)

I saw when he was on the bridge dumping body parts into the river for the second time, and then Murata started calling the main character a pansy, and let on that he had sex with his wife. Just as the main character started to push back and get mad, the movie froze. The theater was able to get the movie started again, but only at the next meal scene when the main character beats up his daughter and rapes his wife. Could someone let me know what happened in between these two scenes? I'm curious how the Lieutenant knew where the "shack" was, and how Murata died.

Thanks for your help! This was one of the most frustrating cinematic experiences of my life.