Postpublished at 17:45 British Summer Time 15 August 2014
Diniz's compatriot Mahiedine Mekhissi-Benabbadv decided to take off his vest when well clear on the final lap of the 3,000m steeplechase last night and the organisers responded by stripping him of the gold medal as well.
Mekhissi-Benadbbady has previous. As well as fighting compatriot Mehdi Baala immediately after a race in 2011, he pushed the event mascot - a 14-year-old girl inside a over-sized costume -, external after winning steeplechase gold at the last European Championships.
It was perhaps unwise to give the organisers a reason to take his title off him.