Witness interviews are important to obtain information that will be useful to the criminal case. The most important type of witness for the defence case would be a fact witness.
This witness could be the link to substantiating the factual story surrounding the case. This witness could be an eye witness to an event. The witness interviews can be conducted over the telephone or in person depending where they are located. The questions will either follow a technique for questioning a witness or be scripted.
The results will either be reflected in an oral statement that the witness will sign or by recorded statement taking. The key to building the truth is from factual relevant evidence.