In Darden v. State, 629 S.W.2d 46 (Tex. Crim. App. 1982), the prosecutor invited the jury to speculate on uncommitted, extraneous offenses: The prosecution for aggravated robbery, the evidence presented at trial established that the appellant shot a convenience store clerk in the course of a robbery and the body was discovered a half hour later by Leath. In closing argument, the prosecutor asked the jury: Suppose that Leath would have had the bad fortune to walk in there thirty minutes earlier when he was buying his Dr. Pepper ? Don't you suppose he would have gunned down Leath ? Id. at 52. The prosecutor in Darden injected new, harmful facts into the trial and invite the jury to speculate on uncommitted, extraneous offenses.