The authorities were tipped off about a possible document.
An Informant told investigators where the documents were, according to sources.
The documents were located on Trump's property according to the confidential source.
According to reports from Newsweek and The Wall Street Journal, an individual tipped off the authorities to the existence of documents at Mar-a-Lago.
The home of former President Donald Trump was searched by the FBI on Monday. While the FBI and Department of Justice have stayed mum on the reason for the raid, numerous media outlets and the former president's son, Eric Trump, have suggested that it was because of material that Trump took from the White House to Mar-a-Lago.
The National Archives took 15 boxes of documents from Mar-a-Lago and asked the Department of Justice to investigate if Trump broke the law.
Newsweek spoke to two senior government officials who were aware of the FBI raid. According to these officials, an individual told law enforcement what documents Trump had in his possession and where they were.
Newsweek's sources say that the raid was done to avoid giving the former president a photo-op and to keep the process under wraps for as long as possible. Newsweek spoke to a senior Justice Department official who said the raid was a flop because of the backlash.
The report from Newsweek was supported by other reports.
An individual who knew where the papers were stored contacted investigators, according to anonymous sources. According to The Journal, this individual told investigators there were more classified documents at Mar-a-Lago that were not among the 15 boxes that the National Archives retrieved from Trump's residence.
There was no response from the Department of Justice.
It was thought that investigators could have been tipped off. During a live stream on Wednesday, Rep. Marjorie Taylor-Greene raged about the FBI's involvement in Mar-a-Lago.
According to Rolling Stone, the former president and his advisers are trying to get rid of the person who may have given information to the FBI.
Business Insider has an article on it.