Back in 2003, some live carp were found in Lake Erie. That precipitated our study in 2005. Those carp that were found were actually brought in. When we did the genetics on them, it was proven that they were sterile, so they weren't breeding stock. That was the good news. It helped frame our initial study on Asian carp. The other element is that there haven't been any new findings since back in 2003.
On April 2nd, 2012. See this statement in context.