There was no pressure on him to claim and there was no pressure on town. If he had played his cards right he could have sat back and observed what I was saying (and gathering possible connections in my behaviour), accumulated notes and got me lynched in a regular manner. Instead he engaged in conversations with WBG and claimed DT at a time when he really shouldn't have.
Dittert's claim came at lylo and he didn't know how to make a convincing case against the guy he had a red check on. He wanted people to lynch KB (which would've gotten him shot at night, but at least one more day for town). Was it a particularly convincing DT claim? No (for some reason, DT claims never seem to be). However, at least coming at lylo it made some sense for town. At the very least it reduced the chance of hitting scum to 1 out of 2, rather than 3 out of 8, which is nice at lylo.