User blog comment:Ivan the Brony Kaiju/PE Proposal: Rachel Newman/@comment-34055410-20200119011236/@comment-31617896-20200120072224

The cat didn't die. Rachel/Brian just used it as a distraction. Mrs. Fleck took it out of the microwave. It's left ambiguous as to who killed her, as Brian said he wanted to bash her brains in. The death was unnecessarily brutal, implying that it was a crime committed with rage. Brian had a temper.