David Seigel becomes Neal Caffrey's new handler after Peter Burke gets promoted to ASAC. he was fatally shot in One Last Stakeout by Rachel Turner/Rebecca Lowe. His murder investigation became the longest case open during season 5. It ends up being David Seigel who solves his murder.
Before The FBI Edit
Davis Seigel started talking to Caffrey about his past, and revealed that he is very rich. His Grand-father made elavator buttons and Seigel inherited a lot of money. He grew up with trust-fund kids and lawyers etc. but realised that they were the biggest con-men of all. However, arresting family friends means that you get disowned.