counts of destruction of property in D.C. Superior Court.

Sophie Elaine Dennison-Gibby, Justin Toribio Carreno and Cameron Michael Thiers were each charged with misdemeanor destruction of public property less than $1,000 in D.C. Superior Court this month.

They were all arraigned Wednesday and pleaded not guilty.

President Donald Trump said Monday that Interior Secretary Doug Burgum has proof that vandals used a knife to cut open the new paint and dumped fertilizer in the Lincoln Memorial Reflecting Pool, though he declined to specify what proof officials have of the alleged vandalism.

But, as NBC News reported last month, the material had already been peeling off the bottom of the pool at the time of the arrests.

In one case, an officer allegedly saw someone  pull up a piece of the blue paint.  In another instance, a 26-year-old white male allegedly removed a piece of blue sealant and had it in his hand.

In the other case, an officer with the Montana Department of Corrections said he witnessed a woman remove a piece of reflecting pool paint and that she allegedly had another piece in her purse.

Marlene Lenthang and Ted Oberg contributed.