Charles Ng Chi-Tat is a serial killer who operated in the United States. He is believed to have raped, tortured and murdered between 11 and 25 victims with his accomplice Leonard Lake at Lake's cabin in Calaveras County, California, in the Sierra Nevada foothills, 60 miles from Sacramento.

After his 1985 arrest and imprisonment in Canada on robbery and weapons charges, followed by a lengthy dispute between Canada and the United States, Ng was extradited to California, tried, and convicted of 11 murders. He is currently on death row at San Quentin State Prison.

Two handmade Butterfly Origami both signed in full and dated on the underside. Accompanied by a brief one page handwritten letter which Ng had sent to the recipeint along with the origami. Letter is signed Charles. Original matching handwritten envelope is included.