impossible cause the 3rd sealed him and the second in his fight against orochimaru
beside kabuto said that he failed to summon the fourth and shishui whatever uchiha
i think the boss no one though of yet
and also i'm sure the boss is someone we might not know well but when we'll read the name or see him/her we'll recognize him/her right away like someone from an important or popular case
do you think that if conan and kudo appwar on a crime scene and takagi need fingerprint of everyone that got there that he may get in trouble?? i mean kudo and conan are the same