A PP said all paedophiles should be locked up. A paedophile is someone who experiences sexual attraction to a pre-pubescent child. I have absolutely no idea what the figures are as to what percentage of paedophiles act on their attraction and what percentage don't, but the fact that someone is a paedophile doesn't necessarily mean they would hurt a child (or facilitate the hurting of a child by watching child pornography etc). We can't lock people up on the basis of something in their head....
On-topic, I assume the police have more evidence than they are letting on, which doesn't look good for the little girl. I hope for her sake and her family's sake, they get some closure soon. It seems virtually impossible she is still alive and if this man is convicted of killing her, he should be in prison for life. But he is innocent till proven guilty and so I'm not sure how good an idea it is to have his face all over the Internet....