Calling the crime a “despicable act,’’ a judge sentenced a 22-year-old Baton Rouge man to life in prison Monday in the killing of a Georgia insurance agent during an armed robbery at the Waffle House on South Sherwood Forest Boulevard last year.

State District Judge Lou Daniel said Antonius Jones’ actions on May 3, 2010, have “left a mark on this community.’’

“Now they (the family of 54-year-old David DeMersseman) will think of nothing but heartache when they think of Baton Rouge,’’ the judge said moments before sentencing Jones to life in prison on his second-degree murder conviction and 60 years on his armed robbery conviction.

Daniel ordered the terms to run concurrently. Jones was found guilty May 26.

DeMersseman, who was passing through Baton Rouge on May 3, 2010, was the only customer in the Waffle House when he was shot to death at 1:22 a.m.