I'd rather err on the side of the most safety. The state vet really should have it set. You could test the meat once the steer is slaughtered but losing the meat can be devastating I know!
If you can wait on beefing him, try setting up a feed station or salt lick for him so you have him somewhere he can easily be found and then wait out the 30 days. I think a final shot will be less on him than being held again where he is so wild.
Repetition is a key on such a wild animal. If you can, go in his general territory, whistle twice, drop feed (sweet feed or grain or something good) and leave. You may find after a number of days of this he is right there waiting for you to leave so he can get his goodies which will make getting him a bit easier. He may not touch the food at first but familiarity with a routine seems to help them get over that initial fear.
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