Thunderlane's body was discovered, and the police had no leads because this serial killer had no name, just a marking.
"Dammit! This is the 5th dead stallion! What is the relationship between these 5 dead stallions?! If I had that, then maybe we'd be on to something!" Said the cop who was in charge of investigation.
"You needn't worry about this case anymore..."
Then cops then turned around.
"Princess Celestia?"
"Officers, I am relieving you of this case."
"What?"
"Give me the information you have, and I'll be certain the ones I choose to catch this killer shall succeed."
"I'm worried about your choice to do this, but fine, anything to get my mind off of this."
"Thank you officer."
Meanwhile...
The Mane 7: Princess Twilight Sparkle, Spike the Dragon, Applejack, Rainbow Dash, Rarity, Fluttershy, and Pinkie Pie were hanging out in their throwns.
"So friends, I heard that a royal from a faraway land is coming to visit Equestria to discuss peace between both lands."
"Really? That sounds nice, spreading the friendship even further than Equestria." Said Applejack.
"I heard about that! I heard that this royal is a prince." Said Rainbow Dash.
"Correct and I heard his assistant is a female dragon." Said Twilight.
That caused Spike to stop playing SSB4 on his 3DSXL "A...a female dragon?"
"Ooh, is Spikey-Wikey a bit curious?" Rarity said while hiding a smile with hoof.
"N-no, it's just that...I don't see that many female dragons is all." Spike said.
"What about Barb?" Asked Pinkie Pie.
"Well, there's her..."
"And Jade?" Added Fluttershy.
"Yeah, her too."
"Don't forget Corey Powell, Grabledina and her gang, Crackle, Sparks, Whimsey Weatherbe, and Mina." Applejack told him.
"C-can we get back to this Prince guy visiting Equestria please? You girls are making me uncomfortable!" Spike said with a huge blush, that's when..."*Hic* *Belch!*" A letter popped out of Spike.
"It's from Celestia Twilight."
"Read it."
" Dear Twilight,
I know this is out of your field but I believe you and your friends can do it.
Enclosed are files on a murder case.
This serial killer in Fliiydelphia has killed 5 stallions and the police have no leads, maybe your skills & the skills of your 6 friends finally putting this killer away.
From your Teacher:
Princess Celestia."
"Someone's been killing ponies in Filly & the Princess believes we can handle it?" Questioned Rarity.
"What did she mean by 6 friends?" Asked Fluttershy.
Then they all looked at Spike and became worried.
"Me? Why is she making me join in on this?"
"I don't know, but maybe we could not bring you along and say we did, still why would she do something like this?"
"I don't know, but maybe we could be of assistance." Said a masculine voice!
They all turned their heads to the entrance, at the entrance, a lilac earth stallion with a flower around his neck, with baby blue eyes, a lilac & dark purple mane & tail, and finally his cutiemark were flowers. Accompanying him, A dark blue dragoness as tall as him, pink hair like spines, orange ear fins, a yellow underbelly, yellow spade tipped tail, baby blue slitted eyes, and one fang sticking out.
"Salutations, I am Prince Indigo, and this is my assistant."
"Good day, I am Mistress Felicity Brindlestripen Maythorne, but you may call me simply May the dragoness." Then she bowed her head.