So, basically he was going around collecting information to support the stance of the pro-EU government in Kiev and was detained by the separatists for it (I'm not sure you can really call it abducted if you are acting on behalf of one side in an uprising and the other detains you for it).
The funny thing is that his evidence only proves that a few of the anti-EU fighters are from Russia and are adamant they were not sent by Russia but came of their own free will (to aid their fellow cossacks) which we already knew. In WW1 the were Americans coming to fight long before the US joined the war.
So basically collecting information is OK as long as it supports the stance of pro-Russia protestors? Interesting that this is exactly the same position taken by the thugs who have taken control of a TV station in eastern Ukraine - we didn't like what they were saying so now we'll control what they say.
Does this mean that it's OK for Russia Today presenters to be abducted by pro-democracy protestors?