Is there any case law where the evidence of intent was excluded because of the fact that the other crime in the case was related to the same crime?

The present case is distinguishable from Byrd because the evidence of the other crime in that case made such a microscopic contribution to the evidence of intent that this court felt that on retrial the district judge should give serious consideration to excluding it on the ground that the Government did not need on its case in chief a piece of proof of such small worth in proving intent but of prejudicial impact against the accused, when, if the defendant sought to disprove criminal intent, the Government could put it in on rebuttal for what it was worth. United States v. Bozza, 365 F.2d 206, 213 (2 Cir. 1966); United States v. Ross, 321 F.2d 61, 67 (2 Cir. 1963).