They were accused of attempting to pervert the course of justice.

他们因企图妨碍司法公正而被控。

《牛津词典》

As well as abduction and murder, he also denies intending to pervert the course of justice.

BBC: April Jones

He admitted attempting to pervert the course of justice by escaping from the court.

BBC: Easter Ross stalker who went on the run jailed

He had already pleaded guilty to do committing acts tending to pervert the course of justice.

BBC: Denham 'crash for cash' men jailed for Baljinder Gill death