The lawyers also asked for a hearing to determine whether any prosecutors knew that the witness was lying.

The congressman insisted the witnesses against him were lying under government pressure or immunity agreements.

Each witness lied about something, and usually about several things.

Within this context, whether witnesses are lying can usually be decided without difficulty.

They say that witnesses to the crime have been lying to the police to protect a friend.

What should lawyers do when they think a witness is lying?

Vitt also stated that witnesses of the program had lied in the investigation.

He said the witnesses who claimed to have seen him at their arrest were either mistaken or lying.

If a witness lies in court, it is known as perjury, which is a crime.

Some committee members said some witnesses must have lied under oath.