Check the date for the story entry date for when Sasuke found out about Naruto. 14 days after Naruto died is when he found out.

Garra's point of view.

Only a few hours later, most of the Konoha ninjas were gathered as the Hokage gave the mission report. Kazekage is such a better name. I'm proud to bear it.
I stood by Tsunade's side as she talked rather rudely to the other ninjas.
"Ok, that shinobi is out there. As I am sure most of you remember, Uchiha Sasuke is a missing Nin so be on your toes. Since somebody had to tell all their little friends about this mission, you ANBU had better keep an eye on them." She said while shooting a look at Sakura, who blushed faintly. I rolled my eyes as I looked at the other ninja who were accompanying us on this mission. There was Konkuro and Temari of course. My sister had her arm wrapped around Shikamaru's arm. Earlier he and Temari had met at the front gates, both anxious to see each other. I rolled my eyes again. They were so sickly sweet. Belch.
Of course Sakura had to alert the following ninja: Kiba, Hinata, the bug dude... What was his name? Oh Shino. There was also Ino, Choji, Neji and Tenten. Kakashi was also there and the rest were ANBU so their faces were hidden by masks. Tsunade herself was dressed in her regular ninja gear, minus the Hokage robes. I was just looking at the woods, impatient to get this over with.
Temari let go of her boyfriends arm and made her way over to me slowly. Great, what does she want?

Tsunade noticed the movement and gave my sister a questioning look before continuing.
"We will look for two hours. If you find him, alert the nearest ANBU, me, or whoever happens to be close by. Don't go after him alone." She said, now giving me a side glance that meant you too Gaara. Who, me? Why was everyone scared I was going to eat him alive or something? First Sakura, then the Hokage. I hate that name. Fire shadow. FIRE DOSEN'T HAVE A SHADOW! But then again, neither does the wind. Still Kazekage sounds a whole lot better than Hokage. My sister had already made her way by my side in the time I was thinking. She leaned over and whispered in my ear. "Don't go insane if you find Uchiha first. Actually tell us and wait before attacking unless he attacks you, ok?"
I stayed silent.
"Please promise me Gaara. I know you're upset bu-"
I silenced her with a look. "I promise I won't kill him. But I also promise that I will not let him go anywhere so that he may pay for his betrayal."
She gulped, seeing that look of hatred in my eye. I love that effect I have on people.
Tsunade finished up her little speech and said the two words I was waiting for.
"Move out!"

Soon we were moving through the trees with lighting speed. I, of course, had decided to go alone which worried some people. Then again, who was I to care what others thought? I saw a few of the other ninjas sometimes cross my path or heard them behind me for a few paces before shooting off in a different direction. I looked down as I hopped through the trees, looking for some kind of trail or clues to where Uchiha was hiding. Time was running out. Had someone already found him? I was jerked from my thoughts as I spotted something. A small piece of material was sticking out of a twisted root. I made my way over there slowly and looked at a hole concealed ever so carefully.
I went into the root to see a body resting in the corner. A backpack was by his side and was the piece of material I had seen earlier. I sent some sand to Temari and Konkuro, knowing they would alert the rest. I stepped closer to the sleeping figure and reached out a hand.

Sasuke's point of view.

I heard a slight sound and awoke to see a hand reaching for me.
I gasped slightly and moved away, drawing a kunai. I tried to see who it was, but the light was too thin to see properly.
"So you're awake." The figure said chuckling slightly. "Good."
I froze. I recognized that voice. It was a bit deeper, but there was no mistaking that cold tone.
Gaara was standing right in front of me, in this small enclosed area.
I would have gulped, but my mouth was too dry. I raised the kunai in what I thought was a threatening manner. "What do you want Gaara?"
"I want to talk." He sounded pissed off, and I mean really pissed off.
"Fine, talk." I said, still holding my kunai up so if he attacked, I would be ready.
"It's all your fault you know." He said. There was a short silence and I decided to keep my mouth shut. "You killed him. Well technically not, but you helped."
"What are you talking about?"
"Naruto. If I wasn't Kazekage, I might have been there. The point was you weren't there. You had too go all evil and if you hadn't, maybe he would be here right now, babbling on about how hard the mission was and how he did it easily!" Gaara said angrily.
I stood there, silent, because I knew he was right. I didn't want to believe it but he was right in a small way.

Gaara's point of view.

He just sat there. After I had let off my steam. Where was the snappy retort? The 'I don't give a damn about Naruto' face. Where was the hit, as he said that it wasn't his fault?
I looked at him, his face was pointed towards the ground. Then he did something I never saw coming.
He looked up at me.
And he was crying.
Tears slid down that ghostly pale face as he stared at me in defeat. No this was worse than defeat.
This was hopelessness.
"Y-you're right. I was so stupid all those years back. If I had just told Orochimaru no that one time, maybe he would be here."
I was shocked. Uchiha was just going to give up like that? Was Naruto that- no, what am I thinking? He hated Naruto. Didn't he?

"You know, Naruto always said that you would come back and that he would forgive you when you did. He always said that it wasn't entirely your fault." I said to the broken Uchiha.
He looked up at me.
"He said that he would be there when you came back to us. When you begged for forgiveness, he said he would welcome you back with open arms."
Sasuke looked like he felt, if even possible, worse.
"I-I never told him." He gasped out.
"Told him what?" I asked, almost starting to comfort Sasuke.
"T-that he was my best friend. In a way, he was one of my only friends. A-and I always acted so cold to him, but he always kept telling me that I would make it through. W-what did he do to deserve death? All he ever did was help and care for people. Why him?" He cried. He just cried as he fell to the ground, the kunai he held skidded away as he cried in to his hands. I moved over to him and grabbed one of his hands. He flinched as I touched him.
"I feel the same way Sasuke. They took my best friend. Naruto was my best friend too. He was the only one who could relate to me. He cared. Do you know how I found out he was dead?"
He shook his head.
"They brought him into my office. Sakura was crying her eyes out as Temari was trying to comfort her. Shikeramaru was just trying not to cry and to be strong for both the other girls. He had been stabbed through the gut by a sword. The bleeding had stopped but he was such a mess." I said, shuddering from the memory. "Do you know who killed him?"
"No, the only information that I found said the people who were involved and the number of deaths." Sasuke said as he looked into my face.
"Sound village ninja killed him. We managed to kill two of them, but at the cost of Naruto's life."
His eyes opened in shock. "What? Sound ninja? Orochimaru would have known! He was as surprised as I was when we got a report saying they heard Naruto was killed!"
"That's because we caught the other ninja and integrated them for information. No one knew till Naruto was brought back to the leaf village. I came with the others and was there when they buried him. So many people cared for Naruto. There wasn't a big ceremony, but a lot of people came to pay their respects. I've stayed here since then and I was going to leave tomorrow. Sasuke I didn't mean those words I said. It's not your fault he died, I just wanted someone to blame."
"I know exactly who to blame." Sasuke said softly. "Orochimaru."
I heard someone approaching, and I knew who it was before I saw them.
I stood up. Sasuke just sat there looking lost. As if life itself had betrayed him. I looked outside and waved to Temari, telling her where we were. I motioned for her to be quiet as she got closer. Konkuro was right behind her.
"He's in there, but I suggest we wait till Tsunade gets here." I whispered pointing to the tree root.
"Shouldn't we tie him up or something?" Konkuro asked.
"I don't think so. That will just make him feel worse." I said while rubbing my temple.
They looked at me questioningly. I looked Temari and Konkuro straight in the eye one at a time.
"He just found out that Naruto is really dead." I whispered and looked away.
Temari gave a short gasp while Konkuro looked away as well.
"We should just wait until Tsunade gets here." I said and turned away. Sasuke had brought up thoughts that I had been trying to bury for almost two weeks.
When will this pain end?

Ok guys read and review that's all I have to say. sniff poor Gaara.