Some disturbing news broke last night on On the Record, as a U.S.-trained elite police commander defected to ISIS. 

Fox News chief intelligence correspondent Catherine Herridge reported that Gulmurod Khalimov was trained by U.S. Special Forces to operate elite police units in Tajikistan. 

Herridge noted that the United States and Russia have some common ground on training forces in that region to counter the threat from Islamists. 

The country is located along the northern border of Afghanistan and Pakistan. 

Khalimov had disappeared about three weeks ago, but reappeared in a YouTube video dressed in black, declaring his allegiance to the Islamic State. 

Watch Catherine's report above.