They rarely do, do they?
I think he doesn't look like someone who would be good at organisation and planning and military precision and all that.. but again, looks are deceiving.
And maybe there wasn't much 'military precision' involved, as the police seem to have known where to look very soon after the crime.
I hope whoever committed this awful crime is put away for a long long time. It may be this man, it may not. Maybe he doesn't look like a murderer because he isn't a murderer - he has to be proven guilty, and he's innocent until then.