Thanks for posting this here. I've just posted about it in the Iguana Discussion board. I went there for three weeks last year and worked as a volunteer with these amazing animals. I can't believe that someone has done this.
This is Pedro, one of the iguanas killed. I had the honour of feeding him everyday for three weeks. I'm just stunned, but can't imagine what Fred Burton and warden John must be feeling right now.
They've put an official press release on the website and also a link for donations.