http://news.tvchosun.com/site/data/html_dir/2014/07/01/2014070190300.html

[Anchor] TV Chosun’s reporting has confirmed that Kim Jong Un has developed a straight scar on his forehead.
Kim Jong Un has suddenly become a scarface, but whether he had an accident or why this scar appeared is still unknown. This is an exclusive report by reporter Kim Dong-hyeon. [Report] This is a photo of Kim Jong Un, the First Chairman of the National Defense Commission, published on the front page of Rodong Sinmun on April 10.
There is no scar on his forehead at all. The same was true when he visited the Songdowon International Children’s Camp on April 21. However, in a photo reported on the 29th of last month, a straight scar on the right side of Kim Jong Un’s forehead is clearly visible.
Even in today’s issue of Rodong Sinmun, Kim Jong Un’s scar remains visible. The wound is a straight line about 4 to 5 cm long at an angle of about 30 degrees, and the right forehead appears slightly sunken. Experts rule out the possibility that it is a wrinkle caused by obesity.
Kim Jong-seo / Director, Kim Jong-seo Plastic Surgery Clinic
"The possibility that someone assaulted Kim Jong Un is extremely low."
"If that is the case, we can think that he injured himself, and the possibility that he was intoxicated is very high."
"The wound on the forehead is straight and sunken, so it is a wound caused by blunt trauma."
"Looking at the straight indentation of the wound, it appears to have been caused by hitting the edge of a threshold, door frame, or table."
"If he hit a threshold, he would have to be taller, and the wound would appear horizontally."
"If he hit the edge of a wall, the wound would remain vertical."
"But looking at the slope at a 30-degree angle, it seems the wound was caused by falling forward onto a table."
"If he had fallen to the floor, there would have been injuries to his cheekbones or other areas, and it would be difficult for such a straight indentation to form on the forehead."
"If he had been drinking and sitting at a table, he was probably somewhat right-handed. The angle matches when turned about 30 degrees.
So it can be said that the chance he was injured while drinking is over 90%."