Former world heavyweight champion Tyson Fury has tweeted a smiley picture of himself with Daniel Kinahan, the elder son of cartel boss Christy.
Daniel Kinahan is believed to have been the main target of the gun attack in Dublin's Regency Hotel last year, in which Kinahan cartel lieutenant David Byrne was murdered.
Daniel Kinahan escaped the attack unharmed.
Tyson, who tweeted his retirement from the world of boxing in October 2016, only to change his mind three hours later, looked in poor physical form in the photo.
🤔🤔🤔🤔🤔🤔🤔🤔🤔🤔🤔🤔🤔🤔 pic.twitter.com/SCva3fg7Tl— TYSON FURY (@Tyson_Fury) March 8, 2017
Mr Kinahan is not new to the world of boxing and has a gym with former boxer Matthew Macklin in Marbella, opened four years ago.
This gym was raided by police in September 2016.
Mr Kinahan's business partner Mr Macklin has spoken publicly in recent times about Daniel's decision to step back from the company due to bad publicity.
Mr Fury on the other hand, is no stranger to bad publicity and in October it was reported he had failed a Voluntary Anti-Doping Association test.
Fury appeared to confirm the report of a positive test for cocaine in a subsequent interview with Rolling Stone magazine, in which he said he had taken cocaine on "many, many occasions" in the previous six months.
This month, however, Fury announced his intentions to return to the world of boxing, tweeting Tony Bellew and Deontay Wilder challenging them to a fight.
Fury and Macklin have no connection to the Hutch-Kinahan feud or to gangland crime.