Manfred Adolf Seel (October 30, 1946 in Königstein im Taunus - August 26, 2014 in Schwalbach am Taunus), nicknamed the Hesse Ripper and Jack the Ripper of Schwalbach, was a suspected German serial killer.
He is suspected of committing five murders in the Frankfurt Rhine-Main area between 1971 and 2004, and is currently under investigation for four other unresolved deaths.
Seel died of esophageal cancer before his alleged crimes were uncovered.