Salt Lake City, Utah - Did government officials intimidate a witness in a trial over videos of the Oklahoma City bombing? That's what a Utah attorney is suggesting.

The trial is expected to wrap up on Wednesday, ending with a ruling by a judge. Attorney Jesse Trentadue says his requests for surveillance tapes from the bomb site have not been granted. The FBI says it has handed over everything it has.

On Tuesday, Trentadue said one of his witnesses backed out after a "visit from government officials." The judge says the allegation is being taken seriously and ordered lawyers representing the FBI to find out if this really happened.

Trentadue says his witness was going to talk about a government operation that had ties to the Oklahoma City bombing investigation.

If Trentadue wins the trial, he hopes to be able to search for the tapes himself rather than having to accept the FBI's answer that they don't exist.