The corporation knew he was not reliable anymore. They feared he might talk and so he was eliminated.
14 seconds sound clip from the Soylent Green movie soundboard.
You can hear this line at 01:07:39 in the Blu-ray version of the movie.
Quote context
[...]
- I see the words, but I can't believe them.
- Believe. The evidence is overwhelming.
- Simonson was a member of the board.
- He learned these facts, and they shook his sanity.
- Then why are they doing this?
- Because it's easier. I think expedient is the word.
- What we need is the proof of what they are doing before we bring it to the Council of Nations.
- What God? Where will we find him?
- Perhaps at home. Yes, at home.
[...]