If it's not local, then how did they gain access to a boat? How would they know where a boat with a key and gas would be available to steal and how would they get to it? Surely by now, the owner would have reported if anything were found suspicious. Would the killer(s) bring their own boat in on a trailer if this crime was planned? Would they be able to launch a boat from the Dermond's dock? Or, if they boated in, how would they know which inlet to enter to access the Dermond's place if they were the ones targeted? Don't the inlets all look pretty much the same?
Even if they were not local, I guess they could have still been familiar with the lake.
Even if they were not local, I guess they could have still been familiar with the lake.