After the incident, Los Angeles Lakers president of basketball operations Magic Johnson, who also attended Michigan State and has a great relationship with Green, tweeted that he had a conversation with Green and he was apologetic to the Warriors organization, fans and everyone involved.
Because of that tweet it appears that Johnson was subpoenaed as a witness in a civil court case, via the Detroit Free Press:
Magic Johnson has been subpoenaed to testify as a witness in a former Michigan State football player’s lawsuit against Golden State Warriors star and former MSU All-America Draymond Green, according to court documents.