Mohammed first showed up for his April arraignment hearing with his long, scraggly beard tinted a rusty red, and it remained dyed the same hue when he returned last week to the courtroom at the Guantanamo Bay U.S. Naval Base in Cuba, according to Reuters.
Prisoners in Guantanamo are prohibited from receiving hair dyes, according to the Irish Independent.
Dyes are banned because they consist of chemicals that could be used as a weapon, reported the news site.
A Pentagon spokesman said Mohammed dyed his hair using the fruit juice and berries served with his breakfast.
"I can confirm that Mr. Mohammed did not avail himself of any outside-the-JTF means to dye his beard but did craft his own natural means by which to do it," the spokesman said, according to Irish Independent.
Mohammed’s bright orange beard had captured media’s attention, as many wondered if he had used henna to color it.
The man who is said to be the architect of the September 11 attacks is on trial and has been in court for the past two week for hearings.