"Have you seen any hard evidence of collusion yet?" CNN's Wolf Blitzer asked Castro.
"I guess I would say this, that my impression is I wouldn't be surprised, after all of this is said and done, that some people end up in jail," Castro replied.
"And how high does that go in your suspicion?" Blitzer asked.
"Well, that's yet to be determined," Castro said.
"But you think some people are going to wind up in jail, not just one individual, but people, plural, is that what you're saying?" Blitzer pressed.
"That's my impression," Castro said. "Yes."
Castro said he could not elaborate further at present.
"But at this point you're confident that at least some Trump associates will end up in jail," Blitzer said.
"If I was betting, I would say yes," Castro replied.
"Including some who are working in the new administration or people who worked or advised the President during the campaign and maybe during the transition?" Blitzer asked.
"As you can imagine, Wolf, I'll have to comment on that later," Castro replied. "But again, if somebody asked me my impression, my impression is that people will probably be charged and I think people will probably go to jail."