Payne had been spending time with his girlfriend Kate Cassidy on vacation before he died on Oct. 16 in Buenos Aires, Argentina
Liam Paynes erratic behavior started ramping up when Kate Cassidy left their vacation ahead of his death on Wednesday, Oct. 16, according to a source close to the late singers girlfriend.
Like you could see from the Snapchat videos, he was a different person around her, the insider tells PEOPLE of the One Direction alum, who died at age 31 after falling from a third-floor balcony at the CasaSur Palermo Hotel in Buenos Aires, Argentina.
The source also revealed that Cassidy, 25, stood by Paynes side during his recent legal drama with ex-fiancée Maya Henry.
She had been super supportive of him through all the legal drama and very much stood by him, the insider told PEOPLE.
In a TikTok shared Oct. 6, Henry, 23, author of the novel Looking Forward, claimed her ex whom she doesnt name in the book but associates with One Direction fans was continuing to blow up her phone.
Last week, she also issued a cease-and-desist order to Payne after she claimed he repeatedly contacted her, per the Daily Mail.
Payne was first spotted with Cassidy in October 2022. While the pair largely kept their relationship quiet at the time, Cassidy shared snippets of her and Paynes romance through red carpet photos to casual selfies.
Sources told ABC News Payne had several drugs in his body, including pink cocaine, at the time of his death. A partial autopsy revealed he had multiple substances in his system when he fell to his death.
Pink cocaine is a recreational drug generally including a combination of methamphetamine, ketamine, MDMA and not necessarily cocaine according to the National Capital Poison Center. The sources also told ABC News an improvised aluminum pipe was used to ingest drugs was found in Paynes hotel room.
Per the report, the British musicians body will remain in Argentina until the autopsy is completed.
Buenos Aires police found Liam Paynes hotel room in total disorder after the singers death. Minutes before the balcony fall, hotel staff alerted emergency services, reporting in a 911 call that the singer had been trashing the room, officials said.
On Oct. 17, law enforcement investigated his room and found the prescription drug clonazepam (brand name: Klonopin), energy supplements, and other over-the-counter drugs scattered throughout the space, along with various items broken, including a TV. A whiskey bottle, lighter, and cellphone were later recovered from the hotels internal courtyard, where Paynes body was discovered after the fall.
According to a preliminary autopsy report, the Teardrops singer died from multiple injuries and internal and external hemorrhages, the National Criminal and Correctional Prosecutors Office confirmed to PEOPLE.
The coroners confirmed to PEOPLE that 25 injuries in the autopsy were compatible with those caused by a fall from a height, explaining that the head injuries were sufficient to cause death, while the internal and external hemorrhages of the skull, thorax, abdomen and limbs contributed to Paynes death.
