but for some reason the assassins felt (correctly) that the boots would be the only thing searched for
Hmh? They did hide their coveralls, too. And probably the helmets as well.
At least one pair of supposedly bloody boots was hidden to implicate a random innocent crewman. The coveralls were hidden in the officers' dining room, where they would nicely implicate high-ranking conspirators and further damage Kirk's and Starfleet's reputation. The helmets could have been elsewhere still.
Sure they did, one look at Dax's feet told them the boots couldn't have been his.
The point is, if boots can be connected to people via records, then Valeris and Chekov could have checked the records on these particular boots and found out that they did
not belong to Crewman Dax, long before Dax himself arrived. If boots cannot be connected to people via records, then finding them would prove absolutely nothing, no matter where they were found.
Must there be records for everything? Are objects scanned and recorded prior to being incinerated?
Probably not. But incidents of somebody incinerating something ought to be fairly easily traceable, as the logs of the incinerators could be read and incidents of something heavy being destroyed could be isolated and connected with times and locations. After that, it would be standard sleuthing: what do the security cameras show, were there witnesses, did somebody punch in a telltale door code, were fingerprints left on the controls? Etc. etc.
I doubt the assassins would want themselves identified (not knowing they were going to be assassinated themselves.)
The plot probably involved lots of double-crossing of that sort. Valeris had been tampering with the computer records; she might have promised to cover the guys' tracks that way, but would instead be tasked with exposing them at a suitable moment.
I can't imagine each and every person aboard the Enterprise being authorized a pair of gravity boots. They would only be needed by the engineering people involved in restoring gravity, and only until gravity was restored.
Wholeheartedly agreed. The very fact that Crewman Dax had such boots in his quarters was considered damning...
Which is why I think the idea of people having to sign a form for gaining access to the boots, or at least punch a code or otherwise ID themselves at the lock on the special locker, carries merit.
Similarly, while Valeris could access phasers in the kitchen easily enough, I guess she left a mark of her actions: the locker IDd her and decided it could safely open for her. Which would explain why she pulled her crazy phaser stunt: she erased the evidence of the previous users - who had been the assassins! What better cover than a pair of cooks? They'd have access to the Klingon diplomatic party, they'd have access to officers' dining room and perhaps even their accommodations, but they wouldn't be particularly missed during alert situations and the like. And more importantly, the phasers at the galley wouldn't be missed...
See, with a little bit of retroactive thinking, ST6 becomes quite an intricate and intriguing whodunnit!
Timo Saloniemi