Tu B’Av: Is יוֹם שֶׁהֻתְּרוּ הַשְּׁבָטִים לָבֹא זֶה בָּזֶה the same as יוֹם שֶׁהֻתַּר בִּנְיָמִין

Did the corpses of ביתר remain intact (though mutilated from battle and torture)? Or was it the skeletons which survived intact?