Nation Feds seek 3-year sentence for man who bought rifle, magazine used by Dayton mass shooter February 20, 2020Kevin Grasha, Cincinnati EnquirerComments Off on Feds seek 3-year sentence for man who bought rifle, magazine used by Dayton mass shooter Prosecutors seek a prison sentence of three years for the man who bought the assault-style rifle and 100-round magazine used by Connor Betts.