NY Times Mr. Gurul, the former federal prosecutor, Clearly they didnt trust him (Manafort).
With a Picked Lock and a Threatened Indictment, Muellers Inquiry Sets a Tone
https://www.nytimes.com/2017/09/18/us/politics/mueller-russia-investigation.html?_r=0
On the day of the raid, Mr. Manafort was scheduled to talk to the Senate Judiciary Committee, an interview that was eventually canceled.
It is unusual for a prosecutor to seek a search warrant against someone who, like Mr. Manafort, had already put his lawyer in contact with the Justice Department. No search warrants were executed during the investigations by Mr. Starr or Patrick J. Fitzgerald, a special counsel appointed during the George W. Bush administration to investigate the leak of the name of a C.I.A. officer.
To get the warrant, Mr. Muellers team had to show probable cause that Mr. Manaforts home contained evidence of a crime. To be allowed to pick the lock and enter the home unannounced, prosecutors had to persuade a federal judge that Mr. Manafort was likely to destroy evidence.
Said Mr. Gurulé, the former federal prosecutor, Clearly they didnt trust him.