but that could just be because of 6 ft under.

i had the same issues you had... why kill stuff instead of get therapy? why take just dexter? for a while, my only theory was that he had a relationship with dex's mom and perhaps dex was his kid, but that's a stretch... the other idea is that maybe brian was older and harry didn't think he could handle that, but maybe dex would be undamaged. so yeah. that's all i got...