I believe the Secret Service called jurisdiction because the crimes were committed against American citizens. He specifically only sold information about reside

I believe the Secret Service called jurisdiction because the crimes were committed against American citizens. He specifically only sold information about residents and citizens of the United States. The Secret Service in that case believe they had reason to investigate crimes against their citizens. I'm not agreeing or disagreeing that it is "right" but I can surely see where they are coming from. Not exactly trying to be World Police in this situation, but investigating crimes against their own citizens.