867 F.3d 517
5th Cir.2017Background
- On May 10, 2012, Ty Stewart, a derrickman on a land-based oil rig, fell ~90 feet to his death while wearing a Capital Safety body harness attached to a self-retracting lifeline; the lifeline cable was severed and investigators concluded the descending top drive caught and severed the cable.
- Stewart was assisting a less-experienced crewmember on the monkey board when the traveling block/top drive was lowered; the operator radioed after seeing Stewart fall and attempted to stop the descent.
- Plaintiffs (Stewart’s parents) sued Capital Safety under the Louisiana Products Liability Act (LPLA) for defective design and inadequate warnings.
- Capital Safety moved to exclude plaintiffs’ engineering expert (Killingsworth) under Daubert and moved for summary judgment; the district court granted Daubert exclusion and then granted summary judgment principally because plaintiffs lacked expert evidence on proximate causation.
- On appeal plaintiffs argued expert testimony was not required because circumstantial evidence and res ipsa loquitur could suffice, and they pointed to standards and an industry article to show Capital Safety’s knowledge; the Fifth Circuit affirmed, holding expert testimony was required and none was proffered after exclusion.
Issues
| Issue | Plaintiff's Argument | Defendant's Argument | Held |
|---|---|---|---|
| Whether expert testimony was required to prove causation under the LPLA | Stewart's parents: not required — circumstantial evidence and res ipsa loquitur suffice | Capital Safety: the accident involves technical matters (physics/engineering/oil-rig practice) so expert proof is required | Expert testimony was required because proving a different lifeline or warning would have prevented the death raises technical questions beyond juror common sense; plaintiffs presented no competent expert on causation, so they failed this element |
| Whether plaintiffs raised a genuine dispute of material fact on defective design and causation without the excluded expert | Plaintiffs: industry standards, alternate Capital Safety lifeline, and an article by a company manager show an available alternative and causation | Capital Safety: without admissible expert causation opinions plaintiffs rely on speculation and cannot meet proximate causation element | Trial court properly granted summary judgment on defective design because causation (element under LPLA) was unsupported after Daubert exclusion |
| Whether plaintiffs could proceed on an inadequate-warnings claim without expert testimony | Plaintiffs: evidence of company knowledge and industry standards creates a jury question on adequacy of warnings | Capital Safety: adequacy and causal effect of warnings require expert proof and plaintiffs lack admissible expert proof | Summary judgment properly entered on inadequate-warnings claim because plaintiffs failed to raise genuine issues on requisite elements (including causation/effect of warnings) without expert evidence |
| Whether the district court erred in excluding the expert under Daubert | Plaintiffs did not challenge the Daubert ruling on appeal (they abandoned that issue) | Capital Safety argued expert’s opinions lacked methodology, data, and reliability | Daubert exclusion stands; appellate decision rests on requirement of expert proof and plaintiffs’ failure to supply it |
Key Cases Cited
- Daubert v. Merrell Dow Pharms., Inc., 509 U.S. 579 (U.S. 1993) (governs admissibility of expert scientific testimony)
- Stahl v. Novartis Pharm. Corp., 283 F.3d 254 (5th Cir. 2002) (elements of LPLA products-liability claims)
- Lavespere v. Niagara Mach. & Tool Works, Inc., 910 F.2d 167 (5th Cir. 1990) (discusses when expert testimony is required vs. when lay/common-sense proof may suffice)
- Malbrough v. Crown Equip. Corp., 392 F.3d 135 (5th Cir. 2004) (plaintiff may sometimes rely on lay testimony, but not when technical issues exceed common understanding)
- Lawson v. Mitsubishi Motor Sales of Am., Inc., 938 So.2d 35 (La. 2006) (recognizes res ipsa loquitur in products cases but does not eliminate need for experts when matters are technical)