I would very much doubt that the accused in the murder case would have been the local bobby's brother. Had it been so, then undoubtedly Adam would have been moved out of the area at the first possible opportunity. It would have made his position untenable.
Incidentally, whereas latterly an officer would be recorded as being stationed at a specific location e.g. "Beauly" or "Cannich", in earlier times it was the Beat which was recorded, such as "Strathglass", because it would seem that the police rented a house where the officer stayed (and used a room as an office). As such, if the rent became too much, or the house became too msall for an officer's family, or if a distant part of the beat became busier and merited moving the officer nearer the "action", an alternative house in the area would be rented. In more recent times, the police authority adopted a policy of building (or buying) houses in the main village of the beat, and thus a permanent location for the "police Station" was established.
I would think that Adam would have been based in or around Cannich, rather than down towards Struy, as Cannich village sits at the junction of several glens.
Cannich, incidentally, became quite a busy place immediately post WW2, with the construction of the Hydro-Electric dams and the quiet glens occupied by large numbers of construction workers!
Sorry I have no information on police "customers"!
Dave