[BubbaLeroy]

Please don't beat yourself up over this. You did your best for Benji and gave him a loving home and tried to help him. You did the right thing for you family. An agressive dog can be very dangerous, and sadly many are so badly damaged by others it can take years of professional help to no avail. I'm sure the rescue will do their best for Benji. You got him on the right track to a healthy life and hopefully there will be a loving family that can continue his journey and be able to deal with his behavorial issues.
My hats off to you and the many other wonderful people out there that work with rescued animals. You are exceptional people.