in criminal trials the defense calls its witnesses first?

true or false -- false?

A fact witness opinons and predictions are admissible in court?
True or False --- false?

I agree with both of your answers.

In criminal trials, the defense does not always call its witnesses first. The sequence of witnesses can vary depending on the specific trial proceedings and the jurisdiction's rules.

To determine whether the defense calls its witnesses first in a particular trial, you would need to consult the specific rules and procedures of that jurisdiction and case. Generally, both the prosecution and defense have the opportunity to present their witnesses and evidence in accordance with the rules of the court.

Regarding the admissibility of a fact witness's opinions and predictions in court, the statement "False" is accurate. Fact witnesses are generally expected to testify about their personal knowledge of facts and events they perceived firsthand. They are not typically allowed to provide opinions or predictions unless they are qualified as an expert witness.

To substantiate this answer, you can refer to legal principles and evidence rules. These principles may vary slightly depending on the jurisdiction, so it is essential to consult the specific laws and rules of the applicable jurisdiction to obtain precise information.