http://www.sodomylaws.org/usa/dc/dcdocuments04.htm
The above material (while specifically in the title referring to sodomy) does indicate that the age of consent in Washington D.C. is in fact 16 years of age. It has been that way for 92 years according to this correspondence. And 16 seems to be age of consent in many other states as well.
You can read it and make your own conclusions. I will not make any conjectures as to the impact on the Foley scenario for fear of being bashed by both sides (so I'm standing neutral at this time) and most likely will be criticized for that.