There is a discussion of Locked Room possibilites in The Locked Room by Wahloo and Sjowall where Martin Beck comes upon the problem. I wish I had a copy of it, but I believe he quotes from another source.
Missing Microchip Solution
Where is the missing microchip?
Casey remembered Friar saying that when
his men entered DeFlorio's room, DeFlorio
"went to" the TV set and "turned down the
volume," yet there was a TV remote inches away from him on the nightstand near
The fact that DeFlorio didn't use the remote, a habit most people have gotten
into these days, told Casey it didn't work-- and it didn't work because he had
placed the missing microchip in it, temporarily disabling it.
DeFlorio had put the microchip inside the TV remote as a temporary hiding
place until he was to leave the motel the next day.
"The Baseball Bat Bashing"
What tipped her off?
If Williams had "hightailed it inside" when
the storm hit, his lawn and hedges should
have been littered with hedge trimmings,
Catching this discrepancy, Molly concluded that Williams may have been lying
about more than yard work. Armed with a search warrant, she and Dawson
turned up a bloody shirt stuffed under the spare tire in Williams' car. Further
testing showed the blood was Frame's, spattered on the shirt when Williams had
bashed in the man's skull in a fit of anger.
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