@failninja21
"Double agent" wasn't quite the right word to use, that's my fault, couldn't think of a better one. Here, Robert K isn't saying anything about being affiliated with an organization. He's just saying that he isn't loyal to Ideal because he only wants to find his brother.
@Rooster
Last chapter. It wasn't outright said, but Robert K's flashback of his little brother is the same as Suteguma's childhood flashback in chapter 236.
@Veshv
Probably electrocuted, because the background effect is same as when Robert K shocked Douji earlier in the chapter. Though that means he probably put the developer's vest on for some reason? Maybe he assumed it was needed to enter the facility.