A Democratic state legislator from east Arkansas, his father and two campaign workers pleaded guilty Wednesday to conspiracy to commit election fraud after federal prosecutors said the lawmaker's campaign bribed absentee voters and destroyed ballots in a special election last year.

Prosecutors said Democratic Rep. Hudson Hallum of Marion, Kent Hallum, Phillip Wayne Carter and Sam Malone acknowledged that they participated in a conspiracy to bribe voters to influence absentee votes in the Arkansas District 54 primary, runoff and general elections in 2011. The four were released pending a sentencing hearing.