United Kingdom's Serious Fraud Office has begun investigations into money laundering involving 1MDB after it was highlighted by Clare Rewcastle Brown and Sarawak Report. The United Kingdom's investigation is focusing on the transfer of money from 1MDB funds in Malaysia to Switzerland as it involved Royal Bank of Scotland's branch in Zurich. The FBI in the United States began investigations regarding money laundering involving 1MDB. The international corruption unit of the US Department of Justice (DOJ) began a probe into property purchases in the United States involving Najib Razak's stepson Riza Aziz and the transfer of millions of dollars into Najib Razak's personal account. The probe was looking at properties purchased by shell companies belonging to Riza Aziz and close family friend Jho Low. Investment banks such as JPMorgan Chase & Co., Deutsche Bank AG and Wells Fargo were asked by the DOJ to retain and turn over records that might be related to improper transfers from 1MDB. The FBI issued subpoenas to several past and present employees of film production company Red Granite Pictures, co-founded by Najib Razak's stepson Riza Aziz, also its chairman, in regards to allegations that US$155 million was diverted from 1MDB to help finance the 2013 film "The Wolf of Wall Street". Also under scrutiny by the FBI and DOJ was the role of global investment bank Goldman Sachs in alleged money laundering and corruption. The FBI probed the connection between Razak and a regional top executive of Goldman Sachs, and the nature of the latter's involvement in multibillion-dollar deals with 1MDB. Tim Leissner, the former chairman of Goldman Sachs' Southeast Asia branch and husband of Kimora Lee Leissner, was issued a subpoena by the DOJ as part of their investigations. In the July 2016 DOJ civil lawsuit, a high-ranking government official having control over 1MDB, who was referred to more than 30 times as "Malaysian Official 1" ("MO1"), was alleged to have received around US$681 million (RM 2.8 billion) of stolen 1MDB money via Falcon Bank in Singapore on 21 and 25 March 2013, of which US$650 million (RM 2.0 billion) was sent back to Falcon Bank on 30 August 2013. In September 2016, Najib Razak was identified as "MO1" by Datuk Abdul Rahman Dahlan, then Minister in the Prime Minister's Department. The wife of "MO1", Rosmah Mansor, was also alleged to have received US$30 million worth of jewels financed from pilfered 1MDB funds.