In surveillance footage released by police, a man and a woman can be seen arriving on the property on skateboards.
After kicking the skateboards toward the site, the couple can be seen sitting on a wall while appearing to pry away the letters.
The two suspects eventually took the letter “E” from the word “committed” off the wall of the burial site, where the phrase “Lives Committed to God, Country and Love” is inscribed along with the names of the Fords and the years they were born and died.
Museum officials told FOX17 they had to spend $400 to replace the stolen letter.
“The president and First Lady are interred here, this is a presidential grave site,” Museum Deputy Director Joel Westphal told FOX17. “There are not many presidential grave sites, we are one of only 14 presidential museums around the country.”
Museum officials said they hope the two suspects are soon found, and view the act as extreme vandalism. They are also looking into other legal action against the pair, FOX17 reported.
Anyone with information about the suspects is asked to contact the Grand Rapids Police Department at 616-456-3836 or 616-456-3989 or Silent Observer at 616-774-2345.