That is unusual for serial killers. I'm sure that the investigators carefully reviewed his whereabouts during that lull to make sure that there weren't victims elsewhere.
I actually heard this piece of rancid fecal matter claim that he's "really not a bad guy." There is absolutely no reason why Rader should be consuming oxygen that someone else could breath.
maybe Rader's work life changed...maybe he had more obligations at his church...
our local serial killer went after prostitutes..
but he didn't kill all of them...
I think he killed when he needed to steal their money...
so serial killers may be sociopaths but they also are pragmatic....