Then, five minutes later, "Shit, I forgot that this one has a different mo-bo than the others."

Different weapon-probablyat the bottom of the harbor, by now-anda different MO.

Did Backhouse say why the two different MOs?

I know we have the... the severed finger, but other than that, this is a completely different MO.

I don't love the different MO, but he may have used a knife on Nicole because he couldn't travel with a gun.