Whether to allow a defendant to prosecute a third-party proceeding under Rule 14 rests within the sounds discretion of the trial court. First Nat'l Bank of Nocona v. Duncan Savings & Loan Ass'n, 957 F.2d 775, 777 (10th Cir. 1992). In exercising its discretion, the court is mindful that the purpose of Rule 14 is to accomplish in one proceeding the adjudication of the rights of all persons concerned in the controversy and to prevent the necessity of trying several related claims in different lawsuits. The rule should be liberally construed to effectuate its intended purposes. United States v. Acord, 209 F.2d 709, 712 (10th Cir.), cert. denied, 347 U.S. 975, 98 L. Ed. 1115, 74 S. Ct. 786 (1954). See also United States v. Yellow Cab Co., 340 U.S. 543, 556, 95 L. Ed. 523, 71 S. Ct. 399 (1951). Thus, the court should generally allow impleader of a proper third-party action unless it will result in some prejudice to the other parties. 4 C. Wright, A. Miller, & M. Kane, Federal Practice and Procedure § 1443, at 303 (2d ed. 1990).
Under rule 14(a) a third-party plaintiff, may cause a summons and complaint to ...