swiss­blawg sum­ma­ri­zes the ruling 1B_26/2016 of the BGer i.S. Ritzmann/Mörgeli:

  • The Fede­ral Supre­me Court con­firms a ban on the use of evi­dence from email and tele­pho­ne data coll­ec­ted en mas­se by the Uni­ver­si­ty of Zurich, becau­se the­re was no suf­fi­ci­ent sus­pi­ci­on of a crime and the coll­ec­tion of data was unreasonable.
  • The­se requi­re­ments had to be obser­ved becau­se the data coll­ec­tion was car­ri­ed out on the initia­ti­ve of the public prosecutor’s office, even if the uni­ver­si­ty car­ri­ed out the evi­dence coll­ec­tion wit­hout coer­ci­on, and becau­se it inter­fe­red with the fun­da­men­tal rights of the data subjects.