Heck no!! Hinky is as hinky does!
From the first call home from jail, I thought Lee was the one who could see through her BS. But, he IMO destroyed evidence, (blue screen) aided and enabled Casey in her "us against them" game with LE. At some point, Caylee should have been the main focus here. The fact that he kept trying to figure her out tells me he knew his niece was dead. Tells me he went out of his way to fabricate emails from Thomas Franck and the Eastern Division agent for Universal.events. com.
Since I do not know how Universal Ventures fits in with Casey's event planning, I must rely on witness statements. Lee's roommate sensed Casey was lying about her job with Universal Studios, but noted that noone questioned her about it.
I do think Lee was called upon to be the fixer in the family. Lee, come check on your mom. Lee, come take care of these protesters. He was caught in the middle.
BUT
I think Lee has had plenty of opportunity to be forthcoming with LE.
I think Lee is now very afraid.
I wish someone in this family had thought of Caylee.