refusal to depose
refusal to give evidence

He is also empowered to decide about his employees' refusal to give evidence.

Bob Dowler commented on Bellfield's refusal to give evidence in court, and for refusing to appear for his sentencing.

He was imprisoned for six months on the grounds of his refusal to give evidence against Sri Aurobindo in the Vande Mataram sedition case.

Leweni told Fiji Live on 10-11 February that Korovavala's testimony would no longer been needed, even though he had recently changed his earlier refusal to give evidence.

While writing "Lieutenant Calley: His Own Story" (Viking, 1971), an account of how William H. Calley Jr. came to be convicted for massacring Vietnamese civilians in My Lai, Mr. Sack was indicted on federal charges involving his refusal to give evidence, but prosecutors dropped the case.