General Motors Corp. v. Gayle

in which GONZALEZ, HECHT, CORNYN, ENOCH, SPECTOR, OWEN and ABBOTT, Justices, joined.

In this original mandamus proceeding, we must first decide whether the trial court abused its discretion by compelling relator to designate in advance whether its crash testing was to be used for evidentiary purposes or solely for consulting purposes, and by ordering that the opposing party be allowed to attend those tests designated as evidentia-ry. Because we conclude that the trial court’s order invades the consulting-expert privilege, and that relator lacks an adequate remedy by appeal, we conditionally…