In 2011, Petzäll discontinued his commitment to the political party that he had been serving up until that point in time.

[1] When the Sweden Democrats entered the Riksdag in the 2010 Swedish general election, Petzäll accepted a seat for the electoral district of the province of Dalarna.

According to Swedish newspaper Expressen, party chairman Jimmie Åkesson urged Petzäll to give up his Riksdag seat, but he declined.

On 26 September, he announced that he would act as an independent politician focusing on drug addiction issues.

[2] On 1 September 2012, Petzäll was found dead in his mother's home in Varberg after an apparent overdose.