Emma Niederbrock shared Communication a relationship Forming_relationships with Richard Samuel McCroskey , a troubled Resolve_problem aspiring rapper .

Together , Emma Niederbrock , McCroskey , her mother and father , along with friend Wells , attended Participation a horrorcore concert Social_event the week before .

McCroskey , 20 years old , was subsequently arrested Arrest , convicted Legal_rulings of the murders Killing and sentenced Legal_rulings to life in prison Prison .