I think that the hiding of what they had done, followed by the lying to cover up, means that they knew that what they were doing would not be approved by others in the shelter and the general public. They also went against the no-kill policy.
I accept that dogs which bite repeatedly may make them difficult to adopt, but as Tobi says, often the previous (non)-caretaker's behaviour or conditions in a refuge can make dogs aggressive. Lots of affection, in the refuge and/or by temporary fostering with experienced people, could turn things around. Careful observation over a long period is necessary. There is little point in claiming to be a "no-kill" shelter if you do kill!
I accept that dogs which bite repeatedly may make them difficult to adopt, but as Tobi says, often the previous (non)-caretaker's behaviour or conditions in a refuge can make dogs aggressive. Lots of affection, in the refuge and/or by temporary fostering with experienced people, could turn things around. Careful observation over a long period is necessary. There is little point in claiming to be a "no-kill" shelter if you do kill!