MANITOWOC, WI (WHBL) - A Manitowoc woman will spend six years in prison for killing three people with her van while driving drunk. 44 year old Becky Holly must also spend 15 years under extended supervision once she leaves prison. Holly struck a plea deal in September, in which she pleaded no contest to three charges of negligent homicide – and seven other charges were dropped. She agreed at the time to spend 20 years behind bars, and that’s what prosecutors asked a judge for on Thursday. But her lawyer says it’s not necessary. He said Holly no longer drinks nor drives, and she needs rehabilitation. Holly struck and killed Lawrence Gerroll, his wife Lou Ann, and their daughter, Joan, near Two Rivers in October of 2011 while they were on a lawn watching a neighbor’s roofing project. Holly’s van drove off a road, and into a yard where the Gerrolls were standing. Holly was also injured, and she entered her sentencing with a walker. Holly cried as she apologized to the victims’ families and friends.