As Derpy Hooves watched the Doctor and Applejack walk away towards the TARDIS's location, she walked into another alley and began to tap the screen of the device on her wrist.
"Welcome to the Wibbly Wobbly Timey Wimey teleporter," came the cheery voice of the Doctor. "Simply enter your destination along with the date and time of the event you'd like to revisit. Just remember. You'll be traveling the time vortex without protection. It can really screw up your back and leave you sore. Use it at your own risk."
Derpy tapped in the correct place, Canterlot, and the correct time, now. She didn't want to revisit the shooting herself. She never thought that violence was the answer, and she disliked the few wars that Equestria had gotten into so far.
She tapped the flashing 'button' on the touch screen and tried to relaxed as she felt her body being stretched and pulled in all sorts of directions. She screamed from the initial shock, but she soon grew accustomed to the pain.
/)*#*(\
Before she knew it, she was outside of the royal castle in Canterlot. She fell to the ground as the rest of the feeling in her nerves returned to her, bringing with them the pain from the unprotected teleport. Cracking her neck, she stood up and began to look around.
It didn't take long to find out where the scene of the crime was. She just followed the wanted posters until she came to what had now become some what of a tourist stop. There was a line leading into the bar to examine the crime scene which had only been cleaned of bodies, but not the evidence itself.
Getting ready for another teleport, she put herself in the mare's bathroom and let the pain from the teleport catch up with her before sneaking out and into the main room.
The sight was astonishing. Tables and chairs were flipped, there were blood stains on a few of the walls, and most of the alcohol in the back had been destroyed, no doubt by gunshots. The room itself had green wallpaper and was in the shape of a semi-circle. It was well decorated with beautiful chandeliers and paintings of famous business ponies from the late 1800's. There was also a noticeable smell of cigarette smoke and- Wait. Gun powder? It was oddly fresh too as if someone had just fired a shot.
Using what little ninja skills she had after traveling for so long with the Doctor, she began to sneak her way Metal Gear Solid-style around, using the tables and chairs for cover. She got as close as she could to some nearby officers who were conversing the matter.
"I hear that the heads of the department are trying to blame this on some earth pony. I don't think it's right, but then again, what can you do to unicorns who are racist?"
"You can kick 'em outa the force, that's what. I just hope we get somethin' else to turn up that will prove that mare's innocence. I mean, come on. Everypony knows she's the element of honesty. Yet still, her lawyer suggested that she plead guilty? Smells like foul play to me."
"Yeah. I guess we'd better get back to the crowd. We got another group of tourists showing up."
"Ugh. Don't they understand what happened here? Three people were murdered in cold blood, yet they still think they should put it on their family's to-do list for the weekend."
The two police ponies walked toward the door. They then pulled back the chains guarding the entrance to let the next set of tourists in. Derpy couldn't believe who she saw enter.
It was her and the Doctor! No sign of Applejack though. That must mean that she was outside with her persepta-whatever it was. Derpy took another quick look around the room, knowing that she would have to teleport rather soon to avoid being seen by her possible future selves. She then noticed her mistake on her teleporter. She had also entered the wrong time. She didn't look to see when though. After all, spoilers.
After searching the edges of the ceiling, she finally found her prize or prizes. In each of the corners were security camera's, all pointed at the crime scene.
Feeling satisfied with her detective work, she used the tables as cover again as she made her way to the bathroom. When she entered, she touched the screen of her teleporter and was off.
/)*#*(\
When she opened her eyes, she was back in the same spot as before she teleported to Canterlot. The Doctor and Applejack were no where in sight, so she assumed that they had to be in the TARDIS putting the final touches on the modifications.
She began to move toward the bar where the time machine was stored, only to stop in her tracks. She hid behind one of the barrels in the street as she saw the Doctor, herself, and Applejack running down the other end of the street with some sort of behemoth chasing them.
"And you're sure that's the thing you saw, Derpy?!" shouted the Doctor as he was running down the street.
"Yeah! I'm sure! I can't tell you where I saw it from though remember?!" shouted the other Derpy as she and the group ran from the beast.
"Yes, I'm aware of that! Just keep running!" The future group passed the barrel that Derpy had been hiding in, sending the whole town into a panicked state. What was that thing that just ran by? Was it dangerous? Why was it chasing those ponies? These were the questions on the minds of Appleloosans as they watched the group charging down the street.
"Oops," said Derpy to herself. "I might have overdone it with the time traveling part." She typed in a few more digits into the teleporter, this time double checking them to make sure that they were right. All the numbers lined up, and she pressed the button on the screen to teleport.
/)*#*(\
She arced her back in pain as the teleport completed. This time, she found herself outside the TARDIS. She picked herself up and brushed herself off, then knocked on the door.