47-year-old LaRose has been held in custody in Philadelphia since October 2009.
Lars Vilks made a drawing in 2007 of the Prophet Mohammed with the body of a dog in 2007. A 100,000 US dollar bounty was put on his head by a group linked to al-Qaida.
Last week Irish police arrested seven men and women, on suspicion of plotting to assassinate Vilks. Irish police then said there were links with the arrests and Colleen LaRose, aka Jihad Jane, in the US.