The german Chaos Computer Club (CCC) got their hands on samples of the "Government Trojan" that should normally used by police authorities for wiretapping on suspected criminals.
The analysis by CCC suggests that this software is not built in accordance to the ruling of Germany's Bundesverfassungsgericht (Federal Constitutional Court). So it purposely breaches constitutional rights. Also, due to the poor coding quality, there are several security flaws opening all doors on the targeted computers including the possibility to push "evidence" on that system.
Read the entire article on the CCC's website: http://ccc.de/en/updates/2011/staatstrojaner