You bring up a very good point. Since I started delving into this case, the original estimated TOD was 1977-1985, this was before we knew about RE/TR. When they released the isotope results in Nov 2015, the time frame was shortened to 1980-1984. We learned about him in Dec. 2016/Jan 2017. We found out he left Manchester around Dec. 1981. We know he resurfaces in CA sometime in 1984, and we don't know where he was in between 1981-1984. He could have still been in NH, just not Manchester. I think there is a possibility he could have been, and these 4 were killed during that time, but the biggest sticking point there is why would he kill the 4 and not D/L, too? It's a bit of a plot hole for a lot of folks.