"Sensei did what?" Leonardo, his eldest brother asked with a frown later that night after their father had gone to bed, and they had all gathered in the living room (or the area large dome like area that served as one) to watch TV for a while before they would make their way to the surface to do as they did every night.

"He asked for another report." Don said as if it was unnatural for Splinter to do strange things. Hell the rat was not only a species altogether different from them and prone to doing strange and often peculiar things. They had made their peace with that after some of the stuff he had done over the years. So Leo and his other brothers couldn't fathom what it was that bothered Donatello about their father's recent behavior.

"So?" Leo asked in an almost challenging tone as Raphael leaned forward in his seat and rested his elbows on his knees. His amber eyes curious to see just how far Don was willing to take this discussion.

"So? So, he's making me keep track of a human," Don almost yelled at him, he was so high strung. Leo blinked at him for a second and then glanced at Raph and they both looked back at him- Their eyes locked on his face, unblinking. In that weird and creepy way that they had apparently picked up from their youngest brother Mikey. Okay now he had everyone's attention. Maybe now he could get them to listen instead of dismissing what he had to say. Leo motioned with a hand for him to continue with one hand before he bothered to say anything else. "He's making me keep tabs on a human." He said again. As if it were the most relevant part of the conversation.

His two older brothers raised a brow at him as if to say again, So?

Pissing him off somewhat before he blurted out. "He has me spying on a human female you morons! He's had me spying on her since we were kids!" Upon hearing this both of his older brothers seemed to tense up where they sat and stared at him. Hard. Seemingly unsure of what to say to this knowledge. When Mikey spoke up for them and asked,

"How long?"

"What?" Don asked stupidly, the question catching him off guard somewhat. Causing Leo to repeat the question for Mikey.

"How long exactly has he had you spying on her?" He asked, his tone slightly cold. Apparently he was already thinking worse case scenario. They'd been seen by someone or something and as such they would have to make sure that person didn't talk.

Ever.

The thought of breaking into some poor girls home in the middle of the night and either terrorizing her or slitting her throat sent a chill down Don's spine. Making him shiver as he stuttered out his reply. "T-Thirteen years."

Leo's frown turned into a scowl as he thought, Wow that is odd, even for sensei. But it was perhaps no stranger than his sometimes sudden outings or walking around the lair naked and scarring them.

Mikey grabbed his arm and said in a low tone, "Dude, that was back when we were kids..." Don rolled his eyes and thought almost sarcastically. Thank you Mikey. So he'd finally figured out how to count, good for him. Leo was silent as he traced their steps back thirteen years, all the way back to their first surface run and growled as Mikey started to say. "You don't think we-"

"No," Raph cut in before stating. "If sensei has Don spying on a human then there is a reason for it. When we were young sensei did have a little bit of a habit of disappearing above ground for a few hours before coming home..." Raph finally said, his voice rough from lack of use since he rarely spoke unless it was to yell at someone. "It is entirely possible that he was seen."

Don shook his head no. While mentally admitting to himself that Raph did have a valid point. He also pointed out to himself that if such a thing had happened their sensei would have taken care of the situation and then come home and told them of what had happened. He would not have risked their safety just to hide something like this from them.

They had far too many enemies out for their blood (and their lives) to have secrets between them.

"What do we do Leo?" Raph asked curiously knowing that if their secret was out they would have to do something about it, and not liking that thought at all. Ninja's they may be by necessity, but murderers...that was something they became only when they had exhausted every other option.

Leo made a low humming tone and considered their options before casting a glance at his brothers then asking, "Do you know where she lives?"

Don, if he could have- would have paled in horror. His mind automatically going to scenes of Miss Blake laying dead either in the middle of her living room with her neck broken or laying in her bed with a large pool of red as vivid as her hair spread out under her from a single wound to her jugular. The images in his mind were so vivid and ghastly that he nearly gagged as he weakly nodded his head.

"Alright. Since we don't know the specifics of the situation we'll go by her place and set up some cameras to keep an eye on her until we have a better understanding of how to proceed."

"We're not going to...kill her?" Mikey asked awkwardly earning a half dark, half humorous look from Leo as he stared at him then snapped.

"What? No! Are you a retard or something?" Before Raph cut in.

"We don't kill wantonly. We only kill when it's necessary, Mikey." And right now they didn't know if it was necessary, so they would wait. Watch. And figure out just why their sensei was bothering to keep an eye on the human.