Law enforcement has roped three persons in their investigations, including a "friend" of the "Both Ways" singer, a hotel housekeeper staff, and an alleged drug dealer identified as Brian Nahuel Paiz, who delivered drugs to him twice on October 14.

Liam Payne's girlfriend Kate Cassidy is said to have given the singer an ultimatum in their relationship, days before he tragically passed away in Argentina last month

I n the aftermath of Liam Payne’s death, a number of questions still remain regarding the events leading up to his passing in Argentina in October. Police are continuing to inve

Liam Payne’s grieving girlfriend Kate Cassidy is giving more details about her decision to leave Argentina in the days before the singer plunged to his death — and she’s telling friends that she gave him an ultimatum to stop using drugs. “His drug use was causing a lot of drama,” said the friend, who speaks to the 25-year-old influencer regularly.

After former One Direction member Liam Payne fell to his death in Buenos Aires, police and investigators continue to search for answers and justice

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Liam Payne's girlfriend, Kate Cassidy, is still 'in shock and disbelief' following his unexpected death at 31 years old. A source tells ET that she’s trying her best to process the loss, leaning on loved ones,