In the Schweigegeld-Prozess trial, former President Donald Trump's lawyers have decided not to have him testify.

Witness Robert Costello's disrespectful behavior towards the judge has drawn criticism.

Costello's sarcastic remarks and eye-rolling led to a reprimand from the judge.

Legal analysts believe Costello's actions could negatively impact Trump's defense.

Costello's testimony did not provide new information and antagonized the judge.

The trial will continue for closing arguments on May 28.

Trump has pled not guilty to falsifying business records.

The outcome of this high-stakes trial, the first for a former president, remains uncertain with significant legal and political consequences.