Do you think they communicate via paper? Raiding office doesn't automatically gives them access to mail/slack etc. And internal comms could be asked for without the nuclear option of raiding the office
Companies are required by law to enable persistence. And in any case if we assume malice how would the police even get access to all emails by raiding if the message and mails are stored in cloud.
AFAIK police can just ask google/slack for the mails with proper warrant.
> And internal comms could be asked for without the nuclear option of raiding the office
Relying on the accused to compile and provide evidence seems naive to me.