This shield belongs to a volunteer first responder from Voluntarios Salud Chile (a brigade set up at Ex Arte Alameda Cinema). While tending a wounded demonstrator during a demonstration, the shield was hit by two tear gas canisters, rendering it useless.
To honour the commitment of volunteer first respondents at protests and demonstrations, and to illustrate how serious police brutality against these responders truly was, the visual artist and photographer Pablo Zamorano, @locopek set up a photographic exhibition with the rescuers using the shield as support.
The attack that destroyed the shield was on 10 January 2020.
The photograph shows the MP Brigade being attacked by the police on 19 February 2020.
This is a video that shows the exact moment the canisters impacted the shield:
And this video shows the attack to the MP Brigade: