Jon Worrell, 58, was arrested in Missouri on Tuesday - nearly 20 years after his wife, Doris, was found shot dead at the sports park she operated with her husband.
Ireland captain Caelan Doris' availability for the British and Irish Lions tour to Australia is in doubt as Leinster confirm he will have a "procedure" on a shoulder injury.
The Eighties star, who was most known for performing alongside his siblings Deniece, Lorraine, Doris, and Delroy Pearson in the British pop group - died at the age of 60 on March 10.