“...It’s not known why the tiger singled out the three visitors or why she tracked down the two wounded victims, apparently ignoring other zoo patrons...”
UH, because she’d already locked her sites on them/scented them, and they were the only ones running ???
'Cause that's what big cats do!
Didja ever see a video of lionesses chasing impalas? They'll go right by one that AIN'T running away to snatch the one she has her eye on!