The teenage mother of “Baby Chelsea” was sentenced today in Tama County court. The Tama County teen, was charged with murder in strangling her newborn daughter last winter, but pled guilty to lesser charges last month, including involuntary manslaughter and child endangerment. 18-year-old Nichole Plum of Chelsea was given a two-year sentence on one charge and a 10-year sentence on the other, with both to be served at the same time.