An official FBI document dated January 2021, obtained by the American association "Property of People" through the Freedom of Information Act.
This document summarizes the possibilities for legal access to data from nine instant messaging services: iMessage, Line, Signal, Telegram, Threema, Viber, WeChat, WhatsApp and Wickr. For each software, different judicial methods are explored, such as subpoena, search warrant, active collection of communications metadata ("Pen Register") or connection data retention law ("18 USC§2703"). Here, in essence, is the information the FBI says it can retrieve:
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Apple iMessage: basic subscriber data; in the case of an iPhone user, investigators may be able to get their hands on message content if the user uses iCloud to synchronize iMessage messages or to back up data on their phone.
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Line: account data (image, username, e-mail address, phone number, Line ID, creation date, usage data, etc.); if the user has not activated end-to-end encryption, investigators can retrieve the texts of exchanges over a seven-day period, but not other data (audio, video, images, location).
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Signal: date and time of account creation and date of last connection.
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Telegram: IP address and phone number for investigations into confirmed terrorists, otherwise nothing.
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Threema: cryptographic fingerprint of phone number and e-mail address, push service tokens if used, public key, account creation date, last connection date.
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Viber: account data and IP address used to create the account; investigators can also access message history (date, time, source, destination).
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WeChat: basic data such as name, phone number, e-mail and IP address, but only for non-Chinese users.
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WhatsApp: the targeted person's basic data, address book and contacts who have the targeted person in their address book; it is possible to collect message metadata in real time ("Pen Register"); message content can be retrieved via iCloud backups.
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Wickr: Date and time of account creation, types of terminal on which the application is installed, date of last connection, number of messages exchanged, external identifiers associated with the account (e-mail addresses, telephone numbers), avatar image, data linked to adding or deleting.
TL;DR Signal is the messaging system that provides the least information to investigators.
Tell that to Fred Hampton.
Dude, that was literally 54 years ago.
And everyone knows that the FBI was never involved in the extrajudicial killing of an innocent dissident besides that one time.
Can you point to any in the last 20 years?
Can you name all of the actors that played Putties in the original English run of Power Rangers from the 90s?
See, I can set arbitrary, movable goal posts, too.
It doesn't work that way. FBI documents remain classified for 50 years before being accessible to FOIA. That means that we don't have the means to confirm culpability outside that 50-year window.
I can throw names at you. But here's what I know will happen in response. You will either;
A) Claim the person was not innocent. Despite conflicting claims, they either had a weapon, attempted violence, whatever. So they deserved to be murdered.
Or
B) The situation is not clear. Nobody was outright blamed. Details are fuzzy. Investigations were inconclusive.
Regardless of what I post, the outcome will never be "Wow, you're right. I guess law enforcement does kill innocent people without impetus sometimes." You will always move the goal posts and claim that I did not meet your burden of proof. Because you're arguing ideologically in bad faith. And since I'm not a fucking idiot, I'm not going to waste my time.
And if you want to say that you are, in fact, arguing in good faith, then my rebuttal is simple;
I'm not doing your fucking homework for you, Billy.
A+ reply.