A Material witness is person with information about an alleged criminal. The most recent version, allows a material witness to be held giving criminals proceedings.
An 'interested' witness is one who has some kind of material stake in the outcome of the case and may not necessarily be an un-biased witness.
The Scales of Justice - 1962 The Material Witness is rated/received certificates of: UK:A
Forensic Files - 2000 Material Witness was released on: USA: 8 February 2006
Harry O - 1973 Material Witness 1-10 was released on: USA: 14 November 1974
Big Town - 1950 Material Witness 5-34 was released on: USA: 30 May 1955
Chicago PD - 2014 A Material Witness 1-9 was released on: USA: 19 March 2014
It depends on why the witness is not there, what kind of witness it is, what kind of case it is, and what sort of evidence the witness is expected to give. In a criminal trial, the case may be dismissed if there is no witness. Or the trial may be delayed while law enforcement finds and brings the witness to court (if they are ignoring a subpoena). If the witness is ill or travelling, the case may be continued to wait for the witness. If the witness is not key, the parties may proceed without him/her, or they may shift around the order or witnesses to allow that witness to appear later in the trial.
The kind of irony in which the audience might witness a crime offstage unseen by any of the characters
If you are a material witness (i.e.: necessary to prove the offense) you could have a bench warrant issued for you and your attendance will be compelled.
??? I dont understand your question. Please rephrase.
Manmade material
Whatever you want to give.