At first, Alyssa Partsch and Jazreanna Sheppard Gonzalez were only connected by hostile social media messages. That is, until an in-person encounter ended in tragedy. What started as online threats escalated to violence, leaving Boston and a young mother's family mourning her loss.RELATED: Suspect Reportedly In Custody After 7-Month-Old Is Fatally Shot In Brooklyn (VIDEO)Partsch Sentenced 15-20 Years For Fatal Stabbing In BostonOn Wednesday, Associate Superior Judge Mary K.