I haven’t seen the exact line of questioning, but there are questions you don’t ask for this very reason.
If the guy was asked for an opinion, it’s the attorney who screwed up, not the witness.
If he’s a skilled attorney, he could have asked an indirect question and hoped the witness would ‘go there’, so it wouldn’t be his fault.
The lawyer in question was the defense lawyer — it came up in the cross-examination.
Disagree with the ruling. The detective was testifying about his interrogation of Zimmerman and the reasons he conducted it in the way he did. Therefore his assessment of Zimmerman’s truth fullness as he went along and what that assessment meant to the investigation, were all relevant.
He also said he believed Zimmerman and that he found zero evidence Zimmerman racially profiled TM.
Keep in mind this “mistake” may be by the judge and could result in the successful appeal of a Z conviction.