Christmas more bloody than the New Holiday period?...

Some years ago there was purportedly FBI statistics that showed that the two days of Christmas saw more homicides than the two days of the New Year holiday. [[I say purportedly because I can't cite where I read or heard this.) More homicides supposedly happen over Christmas due to people being brought together that often have clashing chemistry, whereas during New Year's Eve/Day folks tend to be more with selected company.

Curious if anyone has come across a piece of sociology. It does make for a good topic at happy hour, I've found. What is Detroit looking like so far for '10, around 350 homicides?