India, Feb. 23 -- Authorities are piecing together the events leading up to the fatal shooting of Austin Tucker Martin, the armed man killed by Secret Service agents outside President Donald Trump's Mar-a-Lago resort early Sunday. It has been revealed that the 21-year-old had expressed frustration after the release of the latest trove of the Jeffrey Epstein files.

Neither Trump nor First Lady Melania was in Palm Beach when the shooting took place at around 1:30 AM local time. The Secret Service spokesperson revealed that Martin had a gas can and a shotgun. The suspect was from North Carolina, and authorities said his family had recently reported him missing.

He's believed to have purchased his shotgun while driving south, Secret Service...