Here is the unpublished opinion in United States v. Romero.

The underlying conviction was for assaulting a Bureau of Indian Affairs corrections officer.

An excerpt:

Mr. Romero argues that the district court should not have considered his 2003 tribal court conviction because he pled guilty without the assistance of counsel. He fails, however, to develop this argument. He cites no case holding that a district court is precluded from considering a defendant’s prior, uncounseled tribal court convictions in its departure analysis, and in fact, our precedents do not support his contention. Cf. United States v. Concha, 294 F.3d 1248, 1253-54, 1255 (10th Cir. 2002) (upholding district court’s consideration of criminal conduct underlying uncounseled foreign convictions in departure analysis); United States v. Wyne, 41 F.3d 1405, 1409 n.5 (10th Cir. 1994) (disapproving of another circuit’s reversal of upward departure on basis that misdemeanor convictions were uncounseled).