Last summer , Mr. Aguirre testified to Congress that his investigation into the fund was supported by senior S.E.C. officials until he sought the testimony of John J. Mack , now the chief executive of Morgan Stanley and a friend of Mr. Samberg 's .
John J. Mack /business/person/company Morgan Stanley
JJ NN , NNP NNP VBD TO NNP IN PRP$ NN IN DT NN VBD VBN IN JJ NNP NNS IN PRP VBD DT NN IN NNP NNP NNP , RB DT JJ NN IN NNP NNP CC DT NN IN NNP NNP POS .
John J. Mack
PERSON
Morgan Stanley
ORGANIZATION
/business/person/company