David Giffen

David Giffen is not mentioned in either of the provided news articles. The articles focus on New York City's response to the deaths of homeless individuals during a cold winter. They highlight the scrutiny faced by Mayor Zohran Mamdani regarding the city's handling of its unhoused population and the appointment of Erin Dalton as the new commissioner of the city’s Department of Social Services. One article also describes the experience of a homeless man known as "Uncle" who refused shelter due to safety concerns. Therefore, without further information, it's impossible to provide any details about David Giffen's background, newsworthiness, or relevance based on the given context.