They used to have this in Scorland - Guilty, Not Guilty and Not Proven, with the last two legally having the same affect (ie being aquitted) but I believe Not Proven was abolished at the start of this year.

I believe the problem was that in practice it became He Totally Did It But The Evidence Sucks So He Gets To Walk Free, and was increasingly interpreted as such. In the public's eye, everything besides a Not Guilty meant you did it.