Apparently, Mr. Fredenberg acted stupidly, and paid for it with his life.
Yep. Sounds like it was a fun time around there. The frisky Mrs. Fredenberg claiming that Mr. Fredenberg had a problem with the bottle, and that the two of them beat each other up when alcohol was around. Mrs. Fredenberg (conveniently or coincidentally) sitting in her car outside when the shooting occurred, and telling the police that she had warned her boy-toy Harper not to open the door when hubby came a-callin'.
Seems as if it was hubby who needed a warning, as the events played out.