Images have surfaced online that appear to show the gunman that killed nine people at an African-American church in South Carolinaposing with a gun.
The collection of photographs discovered on a website also show 21-year-old Dylann Roof burning the US flag and visiting a slave plantation.
In one image he is shown staring down the camera while sitting on a chair in camouflage trousers holding a gun.
It is unclear who posted the images on the site, which was found on Saturday.
The website was taken offline on Saturday shortly after it was discovered. Internet records suggest its domain was registered in February but it is unclear who was behind it.
Data from the images show many of them were taken in April and May this year.
Many of the photographs show Mr Roof posing with the Confederate flag, a symbol used in the US south during the civil war when southern states tried to break away to prevent the abolition of slavery.
It is viewed by many as symbolising the white supremacy advocated by those states at the time.
Mr Roof was arrested on Thursday and charged with the murders of nine African-Americans at the Emanuel African Methodist Church in downtown Charleston.
Police said he spent an hour sitting with parishioners inside the church before opening fire on them on Wednesday evening.
Crowds gathered outside the historic church on Saturday to hear pastors from across the US lead prayers.
The church is due to reopen on Sunday for a service at 09:00 local time (13:00 GMT).