It is with great grief and shock that we note the recent murder of criminal law co-editor Dan Markel, D’Alemberte Professor of Law, at Florida State University. Dan received his undergraduate and law degrees from Harvard University (where he later was a Berkman fellow) and a M.Phil in political and intellectual history from Cambridge University. After working as an associate with the Washington D.C. law firm of Kellogg, Huber, Hansen, Todd, Evans, & Figel, Dan joined the FSU faculty in 2005. Dan may be best known as the founder and anchor of PrawfsBlawg, a pioneering legal blog that hosts a forum of legal academics commenting on the Supreme Court, the legal job market, and all things jurisprudential. For readers of criminal law posts on Jotwell Dan will be remembered for producing a tidal wave of articles and a book during his less than a decade as a law professor examining facets of modern criminal law procedure and substance from the perspective of his original reconstruction of liberal retributivism. Tilting at such seemingly disparate targets as mercy, family privileges in evidentiary rules, and capital punishment, Dan followed his principles out to the limits of where his razor sharp analytics took him. Dan founded and contributed to intellectual communities both online and in person, and he enjoyed them more thoroughly than almost anyone, we are grateful to have had him in ours. He will be sorely missed.