When it happened I mentioned it in ALL Chat right after, and Braum said, "^" without quotes, indicating it was true to the enemy team I believe, so that would narrow down at what time it happened.
I don't know if Riot is able to look at the match on their end without me giving them anything as long as they know which match it happened during.
It was during this game: http://matchhistory.na.leagueoflegends.com/en/#match-details/NA1/2024932632/213458271
I don't currently have a way to record a game set up so I'd have to figure something out and then experiment. I don't know if I can do it alone, it might only work with wards that are not my own (there may not be any difference though). Unless Braum sold his SS or exchanged his Trinket it must have been one of the other guys' Trinket, it was not my ward (its skin was not one I own).
I didn't have any kind of program going to save the replay for later. Could be difficult to reproduce, haven't tried yet.
During that game the ADC DC'd near the start, morale was low for my teammates so we agreed to let the enemy team push to get it over with.