Morgan Stanley Broker Tied to Anna Gristina Is Identified March 7, 2012, 1:59 pm The broker from Morgan Stanley who met with the woman accused of running a brothel on the Upper East Side of Manhattan has been identified as David Spencer Walker, according to the Dealbook blog. Mr. Walker was the man the woman, Anna Gristina, was with when she was arrested last month. The two were discussing financing to expand Ms. Gristina's business, according to Manhattan prosecutors. Her lawyer said she was planning an online dating service. Read more on DealBook