photographer4
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I am an avid metal detectorist and have a decent set of devices to work with. I don’t know if the police used one in their investigation but I wanted to provide some info on them so people understand how they work. Their original use was to sweep for mines.A metal detector coil is 5 to 12 inches, sometimes larger, but more often 8 to 10 inches or so. It's likely they didn't sweep the scene on day 1, probably not day 2 either. It takes a long time to sweep an area with a 10 inch coil and ensure absolute coverage. One rule in detecting...the coil has to pass over, or extremely close to an object in order to detect it.
My experience tells me chances are good that bullet wasn't seen by walking around and looking down.
Some of them can detect to a greater radius than ya might think.
I wonder if they did use a metal detector if they also found other bullets or things that we don’t know about yet?
Metal detector - Wikipedia
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