I would not expect icing on that trip at this time of the year. The PA32 is not capable of flight in icing conditions. Perhaps this was related to thunderstorms?
Media report here
On the way from Venice to Leipzig – “Holiday Time” boss Thomas Wagner dies in plane crash.
Unister boss Thomas Wagner was killed. Also three other people died.
The US registered machine of the type Piper 32 was en route from Venice to Leipzig, the media reported, citing to the police. The pilot had reported before the crash at Predmeja east of the country problems because of icing. The machine was raced and burned in the mountainous terrain in the forest.
A spokeswoman for the airport in Leipzig confirmed that a private plane for 14:45 was announced at the Airport. Among the passengers could not confirm the accuracy of the airport, she said.
source
http://archyworldys.com/on-the-way-f...n-plane-crash/