The trial for the man accused of killing three Alexandria residents over a 10-year span will begin Monday.
One hundred jurors will report to court for jury selection Monday. If officials cannot seat a jury, 50 additional jurors will report Tuesday.
Severance is accused of killing Nancy Dunning, wife of then-Sheriff James Dunning, in 2003; transportation planner Ron Kirby in 2013 and music teacher Ruthanne Lodato last year.
Prosecutors say Severance, a former Alexandria resident with a history of erratic behavior, was seeking revenge against what he perceived as the city's ruling class for losing a child custody case.
Defense lawyers say the government's case is weak.
Severance entered a not guilty plea last week.