Not a Legal Expert, But Isn't Harboring a Fugitive Against the Law?

A photo shows two men in suits smiling for a photo in an office with bookshelves and a framed portrait of Frederick Douglass on the wall behind them. The overlaid text states that Senator Cory Booker took this photo with Yoav Gallant, who is wanted by the ICC for war crimes, in front of Douglass's portrait. The image is shared as a tweet with commentary.