Bumping again for extended interest (since a number of interesting questions arose).
Bump!
I myself think they are rather recent due to the clothing, appear to be in December due to the low sun angle and thick jackets, scenery appears to be Tibet, and finally, it says in Chinese that they are a criminal, murderous gang. One of the signs on the girl in the white sweater says her crime, as well as her name: Lung Kum Feng (Japanese "Taka Kin Fu", or in English, the three characters for "Land", "Gold" and "Wind"). I am not sure that the name is Tibetan, appears to be "Han" ethnicity in orgin. Family name is "Lung".
One devil's advocate observation about these people killed, particularly the 'White Sweater Girl'. Does THAT face really look like that of a murderer or street criminal? Another devil's advocate position: In a place like the PRC which is full of executions, lies and fabrications, should we project our Western sense of truth and democracy and say that simply because the signs around their necks and on the truck call them murderers, accordingly, they ARE murderers? There is a long history in Communism of anti-revolutionaries being killed, and on the charges of murder or other charges.
At any rate, I conducted word searches both on Chinese search engines using the simplified Chinese script (such as in the PRC and Singapore, and found NOTHING with this girls' name on it), and further, I did it in the more traditional Chinese script, particularly from Taiwan sites, and found nothing.
Can somebody "google" the executed's name somewhere else on Chinese sites? Maybe some more details will emerge.
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You are far too worldly to think that there is such a thing as a criminal face.
"Lung Kum Feng"
Unless your translating that into the old Wade-Giles form of pinyin, you missed those first two characters. It should be Lu Jin Feng as the girls name.