Disclaimer: I do not own CSI: CRIME SCENE INVESTIGATION or MY LITTLE PONY: FRIENDSHIP IS MAGIC or any of their included characters. All I own is the story line and the idea for the crossover.
CHAPTER ONE: BRIEF HISTORY OF LOS PEGASUS
Most ponies in Equestria don't talk about Los Pegasus for one reason. It's simply not like the rest of the land. Los Pegasus is full of crime. Nopony exactly knows why, but that doesn't stop ponies from moving there or the flow of tourism. Los Pegasus is the third most visited big city in Equestria, next only to Canterlot and Manehattan. Full of hotels and casinos, the city was never dark. It truly was a city that never slept. The surrounding towns, such as Hooferson and Summarelin, however, were more like Ponyville (in the sense that it was calmer than the city at night). There was still crime in the areas however. Crime ranged from every type of crime imaginable. It ranged from things as simple as pickpockets on the street to murder, with murder being very uncommon. Even though it was Los Pegasus, it was still Equestria, and murder wasn't tolerated beyond anything. The point is, however, that crime was rampant through the city.
Princess Celestia and Princess Luna did their best to change the goings-on in the city, but their efforts were in vein. Whenever they stopped crime, the next week, it would start up again. They tried several ideas. On the first attempt, Princess Celestia used her magic to put anti-breaking spells on the windows and doors of the shops to prevent theft. This seemed to work for a while, until she noticed that there was a sharp increase in street crime and thefts during the day while stores were open, thus putting more pony's safety at risk. Princess Celestia decided it was safer to take down the anti-breaking spells and did just that. While crime at night picked up again, there were fewer crimes taking place during the day, which increased the pony's safety. Princess Luna then had a new idea. It was similar to Celestia's idea, however, instead of it preventing ponies from breaking in, it allowed the owner of the property to know when there was an intruder. It too worked for a while, but the criminals just got quicker and managed to escape before the owners got there. Also, if they weren't quick enough, they would hurt the owners so they could escape. Again, the Princesses had to stop the plan to ensure the safety of their subjects.
After a few years of failure, the Princesses came up with a new plan, possibly the best of them all. They decided to set up the first ever Equestria police force. It was to be the greatest plan in the history of Equestria since the uniting of the Pegasus tribe, Unicorn tribe, and the Earth Pony tribe. Each Princess selected a hoofful of royal guards each down to Los Pegasus to deal with the crime. All in all, there were about 50 guards sent down. These ponies became the first 50 police officers in Equestria's history.
Eventually, crime slowed down. The princess's plan seemed to be working. Arrests were made, and the streets of Los Pegasus were safer than they've been in a long time. That is, until crime prevention started getting a lot tougher. Criminals were getting smarter and started covering their tracks. Arrest levels were going down, and crime was on the rise once again. Ponies went missing, and there was no way to track them down. And, as mentioned before, every now and then, a body of some poor pony would be found, with no way to avenge them, or console their family. The police were arriving at scenes of reported crimes and found nothing what-so-ever that could help them. Crime in Los Pegasus was worse than anypony had ever seen it, and by now, it was too late to do anything about it. The criminals knew how to outsmart police so even if they were disbanded, the criminals would still know how to evade capture.
Back when the police force was first set up, Princess Celestia had asked Shining Armor to head up the force as police captain. Because that would have involved moving from their home in the Crystal Empire, Shining Armor thought he should run it by Cadance before accepting. When he brought it up at dinner, to his surprise, she completely agreed. She knew that it was important to all of Equestria to stop this problem, at the very least slow it down. So within 2 months of accepting the offer, Shining Armor and Princess Cadance had packed up all of their belongings and moved down.
When Shining Armor got back to his and Cadance's home one night, after finding yet another home broken into and the resident pony missing, he collapsed onto the couch in the living room. "Is everything alright?" Cadance asked, walking into the room from the kitchen, levitating a cup of tea for each of them. "It's getting worse" Shining Armor said, using his magic to take one of the cups and sipping it, "This is the 5th missing pony in 2 weeks." "That bad huh?" Cadance asked. "Yes" Shining Armor said, taking another sip from his cup. "Tell you what" Cadance said, "I'll talk with Aunt Celestia and Aunt Luna tomorrow and see what we can come up with." "That sounds great" Shining Armor said. They sat for a few minutes to finish their tea before going to bed.
The next morning, Shining Armor went up to work while Cadance went to Princess Celestia and Princess Luna. She informed them of what Shining Armor had told her and the three of them sat down to come up with a solution. After some discussion, the three Princesses came up with the best plan since the police force. They decided to set up the first ever Equestria crime lab. The lab would consist of ponies hoofpicked by Princess Celestia, would have new machines that Princess Cadance would oversee the production and use of, and, once everything in a case was ready, Princess Luna would hear from both the defense and prosecution and act as the judge. In short, there was a new legal system set up.
Princess Celestia chose the 6 best ponies she knew to be the head team in the lab: Rainbow Dash, Twilight Sparkle, Applejack, Fluttershy, Pinkie Pie, and Rarity. It did take a bit of work however to get them to agree. Twilight Sparkle was the first to accept. As soon as she received the letter from Princess Celestia, she and Spike got everything in order and were all set to start the new job. Fluttershy took some convincing. She desperately did not want to leave her animal friends, but she knew that it was an important job. But once Princess Celestia said she could arrange for her to have an animal pen outside her home, she gladly accepted. Applejack also needed some convincing. She knew that she just couldn't leave her responsibilities at Sweet Apple Acres. Apple Bloom noticed this and told her that she would write to their cousin Babs Seed and that together, they could take over her sister's responsibilities. Applejack saw how serious Apple Bloom was when she told her, and knew Apple Bloom and Babs would do the best she could and agreed to go to Los Pegasus. Rarity was easy to convince. As soon as she was asked to take a job in the third most visited city in all of Equestria; and once she found a large home with plenty of space to keep up her fashion career, she gladly took the job. Rainbow Dash saw this as a great opportunity for some action and took the job. Plus, she knew the Wonderbolts performed for a week straight once every three months in Los Pegasus as part of their tour schedule. Pinkie Pie was ready almost instantly. All she needed to do was tell the Cakes she was leaving, pack, and plan a goodbye party for her and her friends and invite everypony in Ponyville.
The goodbye party was held in the ground floor of Sugarcube Corner. At the party, everypony in Ponyville showed up. A lot of goodbyes were said, and tears were shed by everypony. Big Macintosh assured Applejack that he, Apple Bloom, and Babs Seed would do everything they could to keep Sweet Apple Acres running just as it was and would write her if they needed help with anything. Applejack thanked them and gave them a big hug and promised she would visit as much as possible and would return as soon as she could. Meanwhile, Zecora was talking to Twilight. Twilight thanked Zecora for all the help she had given them, from the seeds of truth to determining why Spike kept growing that fateful day. Zecora thanked Twilight for helping her become less intimidating to the people in town and told her that she would keep an eye on Twilight's library in her absence. As the party ended, everypony headed back home, leaving the mane 6 ponies alone in the deserted ground floor of the sweet shop. "I sure will miss this place" Pinkie said. "Me too" Rainbow Dash said, "A lot of good memories here." "Don't worry girls" Twilight said, "We'll be back." "When?" Fluttershy asked. "I guess when we finish the job in Los Pegasus" Applejack said. "Well" Rarity said, "I need to finish packing." And with that, the mane 6 departed for their homes to rest up to depart the next day.
As the sun rose the next morning, the 6 friends left for Neighvada, and together, Rainbow Dash, Twilight Sparkle, Applejack, Fluttershy, Pinkie Pie, and Rarity became Equestria's first grave shift CSI's.
