The 32-year-old man was arrested on suspicion of murder and is still in police custody.
Inquiries are ongoing and no further details are expected to be released today.
More top news
He abused five victims while working in a position of trust within the NHS between September 2014 and June 2016.
The New Zealand-born star's completed the three-year residency period to qualify to play for England but represented Samoa in rugby league.
The 25-year-old popstar, from Doncaster, was arrested after the alleged clash at Los Angeles International Airport on March 3.