## Facts

- Five Alabama property owners sued Ciba Specialty Chemicals Corporation and related entities tied to a chemical manufacturing facility in McIntosh, Alabama.
- Plaintiffs alleged off-site migration of DDT and related compounds from the facility onto their residential properties.
- Plaintiffs sought damages for alleged contamination and resulting diminution in property value, asserting multiple Alabama-law tort and fraud-based theories and a federal RICO claim.
- The case was initially filed as a putative class action; class certification was denied, and the five named plaintiffs continued in a single non-class action.
- Defendants moved to sever the five plaintiffs’ claims into separate actions (and trials) under Federal Rules of Civil Procedure 20(b) and 21, arguing inefficiency, jury confusion, and prejudice.

## Issues

1. Whether the court should sever the five plaintiffs’ claims into separate actions under Rules 20(b) and 21 after class certification was denied.
2. Whether efficiency and avoidance of duplicative proof outweighed asserted risks of prejudice and jury confusion from a joint trial.

## Decision

- The court denied the motion to sever and kept the five plaintiffs’ claims joined for a single trial.
- The court found substantial overlap in liability-related evidence, including facility operations, the existence and mechanisms of off-site DDT contamination, and related regulatory and historical facts.
- The court emphasized that separate trials would require repetitive presentation of complex evidence, including extensive expert testimony likely relevant to each plaintiff.
- The court determined that asserted prejudice and jury confusion were speculative and could be reduced through trial management tools such as limiting instructions, tailored verdict forms, and separate interrogatories by plaintiff.
- The court held that denial of class certification did not compel severance because class certification standards differ from joinder and severance analysis for a small number of plaintiffs.

## Legal Principles

- Severance under Rule 21 is discretionary and is assessed by weighing fairness, judicial economy, efficiency, convenience, and the risk of prejudice or delay.
- Rule 20(b) permits orders, including separate trials, to prevent delay or prejudice when parties are joined; it supports case-management measures short of severance where appropriate.
- Overlapping proof on core liability questions supports trying joined plaintiffs together when duplication from separate trials would be substantial.
- Potential jury confusion or spillover prejudice, without concrete showing, generally does not warrant severance where limiting instructions and structured verdict mechanisms can address it.
- Denial of class certification does not, by itself, establish that a joint trial of a small set of similarly situated plaintiffs is improper.

## Conclusion

The court exercised its discretion under Rules 20(b) and 21 to deny severance, concluding that the shared evidentiary core and avoidance of repetitive expert and factual proof justified a single trial, and that any risk of prejudice could be managed through standard trial procedures.


Fisher v. Ciba Specialty Chemicals Corp., 245 F.R.D. 539 (S.D. Ala. 2007)