Brian Harrison, a conservative Republican who has typically been aligned with Paxton, gave his most forceful criticism yet of the attorney general and his GOP colleagues who have asserted inmate Robert Roberson’s conviction is unquestionable.

The motion escalates a tense standoff between Paxton and a bipartisan Texas House committee, which had subpoenaed Roberson to testify at the Capitol on Friday.

The move is the latest in a back-and-forth over Roberson’s request for a new trial ahead of his expected execution.