In the ongoing defamation process that "Pirates of the Caribbean" star Johnny Depp (58) is conducting against his ex-wife Amber Heard (36), a psychologist and a police officer took the witness stand on Tuesday.

Forensic psychologist Shannon Curry testified in Fairfax County Court in Virginia that she found Heard had borderline personality disorder.

Curry had been hired by Depp's attorneys to prepare an expert opinion on Heard.

Among other things, she checked health records and audio recordings and met the actress twice for tests.

In her estimation, Heard tends towards emotional instability and sudden outbursts of anger, which could also be accompanied by violence.

Depp under oath: I never beat Heard

Depp's lawyers hope the statement will support the actor's claim, who described himself as a victim in the explosive relationship.

On the witness stand, Depp declared under oath that he never hit Heard.

On Monday he had completed his four-day statements.

Cross-examined by his ex-wife's lawyers, he was confronted with videos, photos and audio recordings, some of them shocking, that Heard's lawyers wanted to paint a picture of Depp as an addict with violent breakdowns.

Heard is also said to testify in the process, which will last several weeks.

The actress filed for divorce in 2016 after just 15 months of marriage.

She accused the Hollywood star of domestic violence.

In his civil lawsuit, Depp alleges that his ex-wife made false statements in a 2018 op-ed by the Washington Post about domestic violence.

This would have damaged his reputation.

Depp is suing for around 50 million dollars (a good 45 million euros) in damages for defamation.

The testimony of a policewoman in a previously recorded video link was also shown in the courtroom on Tuesday.

Melissa Saenz described how she was called to their Los Angeles penthouse after the couple had an argument in May 2016.

She found Heard crying but found no signs of injury or damage to property in the home.

Saenz testified that she did not see Heard as a victim of domestic violence.

A few days after the incident, the actress told authorities that Depp had injured her.