At the time this was made the telephone company in Hawaii was GTE they had Stroger switches within the Automatic Electric offices , when you started a call trace you chased down the number one digit at a time as long as they had chased down at least four of the digits it could have been determined that the call come from a payphone because payphones were grouped in blocks of numbers say for instance all the 785-9000 to 785-9999 would Be payphone telephone numbers, So if they had determined it was was 785-9 before he hung up that's all you needed to know that it come from a payphone you just don't know which one.
The title comes from the biblical quote from Matthew, "thou shalt love thy neighbor as thyself."