Wrote about this last year. From the Office of Congressional Ethics. 

SUBJECT: Representative Roger Williams

NATURE OF THE ALLEGED VIOLATION: Representative Roger Williams owns an auto dealership in Weatherford, Texas. On November 4, 2015, Rep. Williams offered, and the House of Representatives accepted by voice vote, an amendment to surface transportation reauthorization legislation to limit a provision of the bill that prohibited the renting or loaning of vehicles subject to safety recalls to companies that are “primarily” engaged in the car rental business. His amendment exempted companies not primarily engaged in the car rental business, such as auto dealers, from the prohibition on renting or loaning vehicles subject to safety recalls. If Representative Williams improperly took official action on a matter in which he had a personal financial interest, then he may have violated House rules and standards of conduct regarding conflicts of interest.

RECOMMENDATION: The Board recommends that the Committee on Ethics further review the allegation that Representative Williams improperly took official action on a matter in which he had a personal financial interest, as there is substantial reason to believe that Representative Williams’ personal financial interest in his auto dealership may be perceived as having influenced his performance of official duties – namely, his decision to offer of an amendment to the surface transportation legislation.

VOTES IN THE AFFIRMATIVE: 6

VOTES IN THE NEGATIVE: 0

ABSTENTIONS: 0 

The US House Ethics Committee's report conclusion (bolding is mine) 

34. Given the foregoing information, the Board finds that there is substantial reason to believe that Representative Williams’ personal financial interest in his auto dealership may be perceived as having influenced his performance of official duties – namely, his decision to offer of an amendment to the surface transportation legislation.

35. Accordingly, the Board recommends that the Committee on Ethics further review the allegation that Representative Williams, by offering his amendment to surface transportation legislation, may have violated House rules and standards of conduct regarding conflicts of interest.

IV. INFORMATION THE OCE WAS UNABLE TO OBTAIN AND RECOMMENDATIONS FOR THE ISSUANCE OF SUBPOENAS

36. Representative Williams, by declining to provide information requested by the OCE, did not cooperate with the OCE review.

37. The Roger Williams Auto Mall, by declining to provide information requested by the OCE, did not cooperate with the OCE review.

38. The Board recommends the issuance of subpoenas to Representative Williams and the Roger Williams Auto Mall. 

You see that? Williams was asked to provide information and DID NOT COOPERATE. Therefore the board is going to issue subpoenas.

I heard that Roger Williams came to Somervell County Republican Club yesterday for a dog and pony show. Wonder if ANY local Republican asked him about this ethics breach? Bet not.