Quote Originally Posted by AssertnFailure
JaySee. You should probably watch episodes 35-75 of the original Naruto series. Your assumptions are making me lol.
Dude. You keep questioning details that are blatantly revealed in yes, the anime.
After Yashamaru dies, Gaara's sheer anger causes a massive concentrated blast of sand to hit his forehead and carve the "AI" tattoo.

Rewatch the Gaara backstory episode before you incessantly argue about what was or wasn't in there.