Spencer Reid has had this feeling about Michael since he was born that Michael was his and now he was gonna find out. Jj had asked him watch Michael for day and this was his chance after jj left Spencer spoke Michael. Are you ready find out if I'm your daddy? Reid and Michael went to hospital Reid asks them do test see if Michael was his or not when they took blood samples Michael cried and Spencer comforted him and said it's okay little guy daddy's here. They put a rush on the results and they found out he was right he is michaels father. He was happy but also mad at jj not telling him so he decided to go to lawyer and sue jj for custody and the court that afternoon decided that he should have full custody til father notice. JJ came pick him up later and finds out he's gone she freaks out til she finds his note and tells her he took Michael to Vegas to see his mom and papers that gave him full custody JJ broke down and cried.