ty, after you see them reach into the Reflecting Pool. Officials say they will have a very visible presence during the 250th celebrations.

 Our job out there is to keep people safe, and we encourage people to come down and enjoy the parks,  U.S. Park Police Deputy Chief David Lamond said.  If you do come down, commit acts of violent vandalism, we will hold them accountable, and they will either be cited or arrested. 

READ MORE: Water begins flowing into Lincoln Memorial Reflecting Pool after renovations

The incident follows a controversial $15 million spring renovation project in which the historic pool was drained and resealed with a new liner that President Donald Trump calls  American Flag Blue.  Shortly after it was refilled, reports, photos and videos surfaced showing pieces of the blue sealant peeling away on its own, with the president-without evidence-blaming vandals.

READ MORE: Reflecting Pool looks 'like vomit,' visitors say; crews continue cleaning job

The U.S. Attorney's office noted that Hearn's case is not isolated; authorities are currently investigating six other related vandalism cases at the site.

What's next:

Fencing has already been erected around the Reflecting Pool ahead of the Fourth of July holiday, according to FOX 5 D.C. reporting, which happens every Fourth of July, though it went up earlier this year. The National Park Service is scheduled to drain the pool and begin repairs once the holiday weekend concludes.