Van der Sloot's attorney told CNN his client is suing the government for more than $13 million for violating his human rights in June 2010.
Van der Sloot, a Dutch national who was the prime suspect in the unsolved disappearance of Alabama teenager Natalee Holloway in Aruba, is accused of killing 21-year-old Stephany Flores last year in his Lima hotel room. He was arrested in Chile a few days after her body was found. The case goes to trial in January.
The lawsuit filed by van der Sloot says he was arrested by Chilean authorities without an international arrest warrant and was not given enough time to appeal his extradition.
Documents from Peru's Ministry of Interior indicate that the Peruvian police had requested van der Sloot's arrest and both Chile and Peru say van der Sloot's expulsion from Chile was legal under the Southern Common Market treaty that allows for international cooperation in criminal matters, CNN said Thursday.