An ex-security staffer for President Joe Biden who posed for pics with former VP Kamala Harris in front of a presidential jet was arrested for a chilling murder in San Francisco . Nation Wood, 25, was arrested Wednesday, just 24 hours after he allegedly shot and killed Samantha Emge, 22, a 2025 graduate of San Francisco State University, at a home in San Francisco’s Sunset District. Wood identified himself as a part-time security staffer for Biden’s White House Secret Service team starting in