This isn't really an appropriate topic to discuss.
ABU should not have to defend their decision to fire an employee. Employees are usually at-will. Even if they wanted to defend their decision they may not be able to due to legal/HR policies. So it isn't really a fair discussion since ABU is probably handicapped in what they can say.
Frankly, its none of our business and the fact that Leems is bringing it up elsewhere reflects negatively on him. OP, the fact that you are importing drama from elsewhere to try to pressure ABU into responding regarding something that should be a private matter reflects negatively on you too.