One woman claims he intentionally tore a condom. That was a lesser charge whose statute of limitations expired a while ago.
The other claims that, after insisting reportedly they use a condom, he waited for her to fall asleep and then started having unprotected see with her -- something he knew she would not consent to. That's the rape charge.
> Then a couple months later, based on no additional information, they reopened the investigation.
The alleged rape victim was initially overwhelmed (not uncommon for a rape victim) and didn't want to press charges. A few days (not months) later, she hired an attorney to represent her who got the case reopened.
Almost all the information the public knows about the case has come directly from Assange (and thus supports his conspiracy theory explanation), since the Swedish protecting authority doesn't comment on pending cases.
This is months after some of the biggest wikileaks releases including "collateral murder" and heading into the release of the Iraq War Logs and State Department Cables. https://en.wikipedia.org/wiki/List_of_material_published_by_...
Then a couple months later, based on no additional information, they reopened the investigation. He ended up going into the Ecuadorian Embassy soon after the release of "Global Intelligence Files" because the USA and private intelligence agencies were after him.
None of this has anything to do with the rape charges though. He is being sent to the USA over the 2010 Manning releases because he was communicating with Manning while she was stealing the docs. If she wasn't such an attention whore, she wouldn't have even been arrested. She bragged about it on IRC...