As reported here in 2009, everything you do on your phone or computer is being saved and can be accessed by “authorities” if they desire. Tim Clemente, a former FBI agent, recently confirmed this on CNN.
Here is an excerpt from a follow up interview:
There’s a way to look at digital communications in the past. I can’t go into detail with how that’s done or what’s done. But I can tell you that no digital communication is secure!