A source close to Kate Cassidy tells PEOPLE exclusively that Liam Payne's "erratic behavior started ramping up" when she left Argentina, where they were on vacation. The One Direction alum died on Oct.

After his death abroad, many have been left wondering why Liam Payne was in Argentina in the days leading up to his tragic passing. While initial reports pointed to him being on vacation, new details have emerged suggesting that the former One Direction star may have been “forced” to stay in Buenos Aires before his death.

The 31-year-old singer was found dead after falling from the third floor of a hotel in the trendy Palermo neighborhood of Argentina’s capital, Buenos Aires police said.

Liam Payne's father gazed down from the hotel balcony where the One Direction star plummeted to his death. He stood there for a few poignant moments before going back into the suite where the 31-year-old singer spent his final hours. There was total chaos ...

Although they split more than 10 years ago, Danielle Peazer said she and the former One Direction member "knew we'd have some sort of connection forever."

Liam Payne’s grief-stricken girlfriend Kate Cassidy emerged out in public for the first time in Florida on Sunday -- just days after revealing she was at a "complete loss" over the One Direction star's tragic death in Argentina.

Liam Payne, 31, a former member of One Direction, was found dead on Wednesday in Buenos Aires after falling from a hotel balcony, according to local authorities. Payne suffered "extremely serious injuries" after falling from the third story of the Casa Sur Hotel in the hip Palermo district of the capital of Argentina,