On August 21, 2007, Blackwater Manager Daniel Carroll threatened to kill Jean Richter, a U.S. State Department Investigator, in Iraq. In June 2014, a New York Times investigation reported that it had secured an internal State Department memo stating this. Richter later returned from Iraq to the US and wrote a scathing review of the lax standards to which Blackwater was held accountable, only two weeks before a serious Blackwater incident in which 17 Iraqi civilians were shot and killed by Blackwater employees under questionable circumstances. The death threat incident was confirmed by a second investigator, a Mr. Thomas, who was also present at the meeting. The shooting incident that followed has been described by some as a "watershed" moment, and a factor which contributed to Iraq's later decision to refuse to allow US troops to stay beyond 2011.