U.S. Olympian canoeist David Hearn was indicted by a grand jury in Washington, D.C., for destruction of property in connection with willfully damaging sealant in the Lincoln Memorial Reflecting Pool, U.S. Attorney Jeanine Pirro said Thursday.

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Pirro said Hearn made a “violent effort” to rip up the sealant in the Reflecting Pool, whose renovation has been a top priority for President Donald Trump this year.

The charge against Hearn in District of Columbia Superior Court is a felony. He faces a maximum possible sentence of 10 years in prison.

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“These landmarks and monuments belong to all of us, and they must be protected for generations to come,” Pirro said.

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