Source

Even if they want to obscure your ability to legally record, speak to your recording device and say what you can see. document using the SALUTE method. Pass SALUTE info to the rapid response network you are a part of.

Size: How many agents/ officers?

Activity: What specifically are the agents doing? If someone is detained and you know their A number and/or DOB, note it.

Location: Give an exact address or intersection and in NYC, a boro. The same address can be found in multiple boros. Include Av/St/Rd etc.

Unit(s): What letters, details, or patches are visible on the uniforms/jackets/vests/vehicles? Example: HSI/Homeland Security Investigations/Police Gang Unit, ERO, POLICE, CBP/US Customs and Border Protection, CBP Field Operations, POLICE DHS (2 kinds: NYPD Dept Homeless Services that are NOT ICE and Department of Homeland Security, who are federal agents)

Time: What precise time did you witness this? This info should be shared quickly.

Equipment: What did agents have with them? Ex: weapons, flexicuffs, dogs, door breakers, LRAD sound cannon, vans, SUVs, etc. 

https://www.nysylc.org/ice-watch#politics