The worst kind of crime?

[udsuna]

While I think sexual assault is disgusting, I can't think of a crime more selfish than murder.

I disagree... murder can usually have some kind of "rational" of sorts, I can think of things I'd be willing to kill for. Sexual assault/child molestation is the WORST kind of selfish, there is only one motive for that... so, sexual assault (especially on children) is the worst form of crime.