He went into the woods and didn't come back out. I was looking for him, up until the experiment ended, but I didn't find him. [He pauses, considering this. Shikamaru was kidnapped himself, but returned right in the middle of that said experiment with no memories of being taken - just the thought that he'd gotten lost in the woods. It's likely the same thing.] Hate to say this, but he was probably kidnapped.
[Action]
He went into the woods and didn't come back out. I was looking for him, up until the experiment ended, but I didn't find him. [He pauses, considering this. Shikamaru was kidnapped himself, but returned right in the middle of that said experiment with no memories of being taken - just the thought that he'd gotten lost in the woods. It's likely the same thing.] Hate to say this, but he was probably kidnapped.