M.R. Evid. 611

(a) Control by the court; purposes. The court must exercise reasonable

control over the mode and order of examining witnesses and presenting

evidence so as to:

(1) Make those procedures effective for determining the truth;

(2) Avoid wasting time; and

(3) Protect witnesses from harassment or undue embarrassment.

(b) Scope of cross-examination. Cross-examination may address matters

relevant to any issue in the case, including the credibility of any witness.

The court may limit cross-examination about matters that were not

addressed on direct examination.

(c) Leading questions. Leading questions should not be used on direct

examination except as necessary to develop the witness’s testimony.

Ordinarily, the court should allow leading questions:

(1) On cross-examination; and

(2) When a party calls a hostile witness, an adverse party, or a witness

identified with an adverse party. A hostile witness or a witness

identified with an adverse party may be cross-examined by the

adverse party, but only as to matters that the witness testified to

during his or her examination in chief.

(d) Cross-examination relating to signatures. If a witness’s examination

in chief addresses only the signature to or execution of a paper,

cross-examination must be limited to that signature or execution.