It is unknown how Kostopoulos entered the jewelry shop on Gladstonos street where his killing began.[2] Another Greek LGBT activist, Grigoris Vallianatos [el], said that he entered the shop to escape an altercation on the street.[3] Videos of the killing show Kostopoulos unarmed and trying to escape from the store as he is being attacked by the store's owner and another man, a real estate agent who was a high-ranking member of the National Front.[4] After the window was broken by the owner, Kostopoulos crawled out and fell to the ground after being kicked in the head.[3] Police arrived at the scene.