Yes, it's called Gallows humor, meant to defuse a very upsetting situation by pointing out something ridiculous- but these comments are NEVER ever made in public. That is, if you have any sense of propriety at all.
I agree these comments should not be made public, but alas we live in the days (yet again=1800's England) of media sensationalism, and it pays apparently. Very sad. However, if the media was not pursuing this case, none of us would be here typing about it. We would never have known, it would have been one of millions of murder cases that no one hears about, and would have been tried and resolved by last November. So, you have to take the comments with the reality.
CM gave an answer and he answered honestly as any defense attorney on a bad murder case could. I have to give him something for that, bravado, poor taste and all. Not much he could say without it being misconstrued, so he did the best thing he could. He stated that this will be a pain.