It could be a JEALOUS husband or an Sebellius supporter!!
That occurred to me too. We know that Sebelius failed to report 2/3rds of the money Tiller donated to her campaign, then had to own up to it later.
We know that Tiller and Sebelius had a long term, mutually profitable relationship in Kansas.
We know that he operated his business on the edge of the law, and that she used her influence to quash legal actions against him when he crossed the line.
What else don't we know about their unholy alliance? Who would profit from his martyrdom, and (more importantly) his silence?