EXTREMELY GRAPHIC
http://www.youtube.com/watch?v=bbdEf0QRsLM

"A young woman who was standing aside with her father watching the protests was shot by a basij member hiding on the rooftop of a civilian house. He had clear shot at the girl and could not miss her. However, he aimed straight her heart. I am a doctor, so I rushed to try to save her. But the impact of the gunshot was so fierce that the bullet had blasted inside the victim's chest, and she died in less than 2 minutes. The protests were going on about 1 kilometers away in the main street and some of the protesting crowd were running from tear gass used among them, towards Salehi St. The film is shot by my friend who was standing beside me. Please let the world know."

http://www.time.com/time/world/article/0,8599,1906049,00.html

"Iran's revolution has now run through a full cycle. A gruesomely captivating video of a young woman — laid out on a Tehran street after apparently being shot, blood pouring from her mouth and then across her face

Some sites refer to her as "Neda," Farsi for the voice or the call.

Although it is not yet clear who shot "Neda", her death may have changed everything. For the cycles of mourning in Shiite Islam actually provide a schedule for political combat — a way to generate or revive momentum. Shiite Muslims mourn their dead on the third, seventh and 40th days after a death, and these commemorations are a pivotal part of Iran's rich history. During the revolution, the pattern of confrontations between the shah's security forces and the revolutionaries often played out in 40-day cycles."

Her and her father moments before the shooting:
http://www.youtube.com/watch?v=2QPufN4RLH8