Yeah, that could very easily be a form of Soviet-style assassination. God was with him on the first two attempts. I hope this one turns out to be nothing more than accidental contact, but if not I pray it will fail like the others. The "bump" is one thing, the "smear" that follows is suspicious. The furry pile of that windscreen could potentially hold a large amount of a "substance". SS should have immediately apprehended the reporter and confiscated the mic for testing.
It wasn't Fentanyl though. He'd have been on the ground very soon after. Soviets liked radioactive substances that don't show effects for a long time, which helps make it harder to pinpoint when/where the exposure occurred, thus harder to identify the assassin. This incident was too blatant to escape notice, though. If something were to happen to him, they'll know exactly who it was. I hope he doesn't let them get that close anymore.