Additional text messages allegedly show Amber Heard and Johnny Depp's assistant talking about getting the actor medical attention

Credit: Kevin Mazur/Getty

Amber Heard is standing by her alleged text exchange with Johnny Depp‘s assistant that claims to show a history of abuse – as more alleged messages surface detailing Depp’s supposed remorse.

PEOPLE has exclusively obtained a signed statement by a computer forensic consultant who says he authenticated the May 25, 2014, time stamp on the text exchange, and asserts that none of its contents had been altered.

“On Sunday, June 5, 2016, I was asked to examine iPhone backups of Amber Heard. It was her normal routine to sync her iPhone on the computer,” Kevin Cohen, the tech specialist, says in the signed document. “I forensically imaged and examined the device containing Ms. Heard’s iPhone backups, and I conclude that the backups are authentic.”

Along with the statement, PEOPLE has obtained additional text messages that allegedly show Heard and Stephen Deuters discussing the possibility of getting the actor medical attention.

VIDEO: Johnny Depp and Amber Heard Hadn’t Been Photographed Together for Months Leading Up to Heard’s Divorce Filing

In one message, Deuters and Heard talk about flying out a doctor to Boston (where Depp was filming Black Mass), who has the last name of a prominent L.A. addiction specialist. The messages also allege that Depp was open to receiving help at the time.

Depp’s rep has not commented, and Deuters could not be reached for comment by PEOPLE.

According to TMZ, Deuters claims that the texts were doctored, and denies he ever said that Depp attacked Heard. He also says he was not aware of any incident in which Depp was allegedly abusive toward Heard, and would testify under oath he never had a conversation with Heard about alleged abuse.

In court documents responding to Heard’s initial court filing for a temporary restraining order, Depp’s attorney, Laura Wasser, alleged that Heard “is attempting to secure a premature financial resolution by alleging abuse.”