If you listen to that recording of Steele from the jail house to his wife and son, it comes across as manipulative. When his son asks him the question "did you" it kinda puts old Ed on the back foot. Edgar never answers in the negative as any normal person would do if he was indeed being framed.
Let's look at what is out there:
1. He has a Ukraine girlfriend ( younger than wife? )
2. He was having money problems ?
3. The old murder the wife for the insurance money ?
4. Listening to the wife on the tape, seems the love has gone out of the marriage ?
5. His son sure thinks Ed is capable of doing this "did you" ?