From The Stargate Omnipedia

Officer assigned to Stargate Command, member of SG-9. Winters killed in a conflict with Svarog's Jaffa during negotiations with the Latonan government when the System Lord chose to make himself known.


The Sentinel - Grogan reports to Colonel O'Neill that Winters was taken out by Svarog's Jaffa, along with the rest of his team.