The man who reportedly killed a Helena toddler will spend the rest of his life in prison.  A judge sentenced Coleton Coburn yesterday after he previously pleaded guilty in the beating death of two-year old Persephone Nielson in Helena last year.  Coburn’s defense team had asked the judge to send Coburn to the Montana State Hospital, claiming he suffered from Fetal Alcohol Spectrum Disorder but the judge disagreed.  Coburn reportedly claimed that Persephone had a seizure but medical personnel say they found bruises on the girl along with skull fracturing.