How long is too long for a film monologue? I'm writing a courtroom drama now and each of the attorneys turn out to have massive opening statements which explain the crime committed. Should I tone them down, or should I keep them the way they are?

Can you break up the dialogue with some action descriptions throughout?  Nothing extreme, just pacing and what not.

Be more cleaver than that... Why not open with the crime and then have each Attorney give their argument as it is unfolding?  Why not show two sides of the crime being commited... 1 being told by the victims lawyer and the other from the defendants lawyer?  

That's how I'd do it.  Don't make us sit in a courtroom watching two attorney's giving us their speil...

It's best to break up the monologues with a little bit of action, so it's not one big, tiring section.

In your case, I would make a list of all the necessary things each person needs to say, and then go from there writing the dialogue.  

You might even want to seek out the teleplays for shows like "Law & Order" and see how long their monologues usually last.  If you get your hands on one of those scripts, I'm sure there will be no shortage of examples.

Quoted from Baltis. That's how I'd do it.  Don't make us sit in a courtroom watching two attorney's giving us their speil...

If it's well-written and well-acted (most of all) I find monologues in courtrooms can be rather enthralling.  They just need to strike a good balance.