The "Research Camera" article at the BioShock wiki states:
Brute Splicers stop appearing for a portion of the game, although they re-appear near the end, so it is important to research them sooner rather than later.
I would like to make sure to fully research Brute Splicers before they stop appearing (as they'll only appear again near the end of the game).
At what portion of the game will Brute Splicers stop appearing? (Before they re-appear near the end of the game.)
Note: Can't find any info about this at the "Brute Splicer" article at the BioShock wiki.