I'm almost done slogging through Koontz's latest dark tale, "Forever
Odd," but can't for the life of me figure out who killed Datura. A
cat? A cat-become-lion? Where did it come from? (This is a book not
worth reading.) :(

Thanks for the non-recommendation. My sister had been trying to get me
to read this, and now I have an excuse not to do so!

I read the book and really dont know. It seems like he was running out
of pages and needed to kill her off quickly, so he made up a roaming
tiger that came out of nowhere and killed her. Other then that, the
book was good.

"...so he made up a roaming tiger that came out of nowhere and killed her."

That's the way I read it, too. Deus ex machina. Made no sense.