The Russians sent a warning about the Tsarnaev brothers BEFORE the bombing incident, which was ignored. There was no criminal investigation at the time. Afterward, yes. But not before. The Treaty regarding investigations did not apply before the bombing. That was an exchange of intelligence.
Can it be more clear or do I have to draw some pictures?
My point is that the treaty involving exchange of information on criminal investigations does not require a sua sponte exchange of information. How should the Russians be reasonably expected to know what criminal investigations are taking place in the United States? Such treaties call for a formal request and response. And in these circumstances, there is no way the 0bama regime wants to make that request. It could become the subject of an FOIA request that would implicate 0bama himself. Plausible deniability. We don’t have the Russian e-mails because we never asked. And that suits Putin just fine.
Btw, you’re referring to the FBI et al, totally ignoring of warning from the Russians regarding those folks who bombed the Boston Marathon?
Begs the question, should this type of negligence not been subject to a criminal matter/investigation as well?
You are conflating 'assisting us with criminal investigations' with 'owning up to a criminal act and returning stolen property.' The treaty you keep referring to has nothing to do with criminal acts committed by the Russian government itself against us.