1)
What was Michal's defense?
1.
Rashi: You handed me over (married me) to a bandit! He drew his sword against me, until I sent him. 1
2.
Malbim: Sha'ul accused her of sending him via the window, and tricking him via the Terafim. She answered that he fled by himself, and threatened 'if you will not put the Terafim in place of me, I will kill you when I get the chance.' I feared to deviate!
1
Later, on two occasions, David passed up opportunities to kill Sha'ul, and Sha'ul realized that David is virtuous (24:17, 26:21). Did he then realize that Michal lied to him? (PF)
