The new indictment concerned four children who were aged between one and four-years-old. The abuse was filmed and took place in 2008 and 2009 in Växjö and Jönköping in central Sweden, according to the local Smålandsposten daily.
The man was working as a computer technician when he was exposed in August 2009. The man's encrypted files presented a tough challenge for the police to crack, the newspaper reported.
The 35-year-old was previously convicted by Växjö District Court to five years in prison for the abuse of seven boys, including child rape and aggravated child pornography offences.
The police investigation continued even after the man's conviction which led to the discovery that he was part of an international pedophile network.
Two more paedophiles have since been identified - a childminder in the Netherlands who operated his own orphanage, and a German man who was already in custody.
The new indictment related to the abuse of four children and concerns 13 sex crimes against children, eight of which constitute rape.
The indictment against the 35-year-old lso includes a case the filming of an attack together with a another man in Germany.
The man is scheduled to be eligible for parole in in December, after serving two thirds of his five-year prison sentence.