Did Snape set up the Pensieve scene?

[thesweetestthings23]

No: HPFGUIDX 169620

Stepping away from lurking one more time, I have to believe that
Snape did set up the Pensieve scene.  For what reasons I do not know.
I just can't understand why Snape would have his pensieve out with
that particular memory floating around.  Why would he be reviewing
that? If anyone has any ideas on this, I am more than happy to
receive them.

thesweetestthing