ment procedures requiring both sides to lay their evidentiary cards on the table before trial. See, e.g., United States v. DeLaurentis, 230 F.3d 659, 661 (3d Cir. 2000). Rule 12(b)(2), it is said, helps draw and police this distinction between civil and criminal procedure.
Accepting that Rule 12(b)(2) has long governed, and continues to govern, federal criminal proceedings, what motions might be said to be susceptible to pretrial determination without implicating what the Rule calls “trial of the general issue”? They fall into two general categories. First, some pretrial motions simply do not implicate the general issue at all. These include motions related to what evidence might be admitted at trial (e.g., suppression motions), or the conduct of and preparation for trial {e.g., joinder of offenses and codefendants, venue, bills of particulars, and discovery), for example. See Wright & Leipold, supra, § 191, at 390-92. They also include other motions that seek and result in dismissal of the case altogether but that can be decided, at least in the circumstances of the case at hand, without deciding any disputed questions of fact about the circumstances of the alleged crime {e.g., some speedy trial violations). See id. So long as a motion implicates “faet[s] peculiar to the motion,” and not facts surrounding the question of guilt or innocence, it can’t be said to implicate the general issue. Covington, 395 U.S. at 60, 89 S.Ct. 1559. See also Rule 12(d) (requiring district court to state its “essential findings on the record”). Motions of this kind, however, may involve only the taking of evidence that is “entirely segregable from the evidence to be presented at trial.” United States v. Barletta, 644 F.2d 50, 58 (1st Cir.1981).
Second, other motions may implicate the general issue, but they present themselves for resolution before trial because they don’t require a trial of the general issue. So, for example, a court may always ask “whether the allegations in the indictment, if true, are sufficient to establish a violation of the charged of-fence” and dismiss the indictment if its allegations fail that standard. United States v. Todd, 446 F.3d 1062, 1068 (10th Cir.2006). Even if this question can be fairly said to implicate the general issue, it doesn’t require a trial because it focuses solely on the facts alleged in the indictment and their legal adequacy. See United States v. Sampson, 371 U.S. 75, 78-80, 83 S.Ct. 173, 9 L.Ed.2d 136 (1962). Of course and likewise, courts may entertain motions that require it to answer only pure questions of law. See, e.g., Covington, 395 U.S. at 60, 89 S.Ct. 1559; Serfass v. United States, 420 U.S. 377, 382, 95 S.Ct. 1055, 43 L.Ed.2d 265 (1975); see also Wright & Leipold, supra, § 191, at 392-93. And, we have held, courts may entertain even motions to dismiss that require resort to facts outside the indictment and bearing on the general issue in the “limited circumstances” where “[1] the operative facts are undisputed and [2] the government fails to object to the district court’s consideration of those undisputed facts,” and [3] the district court can determine from them that, “as a matter of law, the government is incapable of proving its case beyond a reasonable doubt.” United States v. Hall, 20 F.3d 1084, 1088 (10th Cir.1994).
We have explained that dismissals under this latter rubric are the “rare exception.” Id.; see also Todd, 446 F.3d at 1068. This is because they are “not made on account of a lack of evidence to support the government’s ease” or, put differently, the government’s refusal to come forward with evidence to support its case in the face of a defendant who has presented his own proof. Todd, 446 F.3d at 1068. And this is because, again, the parties to a criminal