Josh Uretsky offers his explanation of why he improperly accessed HRC's files.

Also, for the holdouts convinced it was just a low-level staffer -- it wasn't. And it was not honest for Weaver to pretend it was.

If what Uretsky says is true -- that he got in the system to "create a record" --- then HRC's info did end up in their system. So it is legitimate for the DNC to want proof that it has been removed.

http://www.cnn.com/2015/12/18/politics/sanders-dnc-data-breach-josh-uretsky/

Uretsky says he got into the system to create a record to make it clear to anyone with NBG-VAN knowledge that he was "going through stuff that I wasn't supposed to have access to."

NGP-VAN is the technology company that provides campaigns access to the voter files.

The point: He wanted people with knowledge of the voter files to be able to clearly see that he was testing the depth of the breach.

"This wasn't the first time we identified a bad breach in the NGP-VAN system," he said. "In retrospect, I got a little panicky because our data was totally exposed, too. We had to have an assessment, and understand of how broad the exposure was and I had to document it so that I could try to calm down and think about what actually happened so that I could figure out how to protect our stuff."