Let’s approach it as Lt. Columbo would: [in Peter Falk voice]
“So our shooter was standing right here, between these bushes, facing that city limits sign. Bang! Now, Mrs. Columbo always complains when I bring Tacos and I leave the dirty dishes on the table and then when she finds them, she reminds me that my doctor told me I should lose some weight… , but this guy? No, he’s not leaving any traces. The city sign gets fixed, bullet hole is patched up, but you still can see the paint job he did. Now if I were to shoot someone and cover up my traces, I might do the same… But there is a big problem though: where is the body? Because, no body, no murder, and no murder, case closed, right? Yeah, I figured that too. But then there is just one little thing I can’t get my head around… The killer took the time to paint over the population count! You see? The elevation on the right is white too, but not as fresh and clean as that 80 over here… Now what kind of killer would worry about that after covering up all tracks so perfectly?”
(Walk away, then turn back)
“Oh, and one more thing:
When a prominent person, such as this Chuck character, dies, surely there would be an autopsy report to make sure he died of natural causes, you know, insurances and benificiaries of his legacy and all that. Wouldn’t you think that too?”
Who hides in the bushes near city limits, carries a gun professionally and keeps record of the inhabitants? Right-a-reno!
And whose job is it to perform that autopsy and write the report? Right-a-boo!
But whom did he/they kill then? Well, that answer is coded by the radio light flashing. Obviously!