In name of Science, the warehouse! (Open)

It's currently dark evening almost midnight at the area. There are few police cars surrounding a warehouse with sirens still glowing but with no sound. Policemen are currently with flashlights walking around the warehouse and checking the corpses of victims.
Ren and Moe - the two witnesses are currently standing by the door of warehouse and are interviewed by a officer while holding a notebook and pen writing down what they are saying. All detectives are being called and asked to join in solving this case.

M being one of the policemen, except with different clothes - wearing only a white shirt, black tie and dark blue jeans, drives to the warehouse in his Dodge Challenger that has a small glowing only siren attached to the roof. He stops by the other police cars stepping out of the car and slamming door closed

Jimmy had dropped his previous case because he felt it was too gory for him. However, when he heard about another case that he could undertake, he took it in a flash.
And it wasn't supposed to be as gory, so that was a good thing.

Jimmy stepped into the warehouse, the door creaking as he opened it. His footsteps made a small amount of sound as his feet struck the floor.
But when Jimmy heard a door slam behind him, he span around.
"Oh, hello!" He called over to M, still standing in the doorway of the warehouse.

M has walked inside the warehouse to check out the corpses and examine the area since he was pretty much in a mood to solve another case now. It was actually a big surprise when he saw the detective he solved a case with earlier. "Hey there, Jimmy, so you got informed about this murder also?" M asked before walking past him and squatting next to the corpses.

Next to the corpses, two more policemen with flashlight were examining bodies and collecting information on them to see what were they doing here and maybe even find out their identities.

"Yeah. Nice to meet you again." Jimmy chucked, placing a hand behind his neck as he remembered the time when he deceived M and thought him to be the real murderer.... all in good humor though!

Jimmy sat down next to one of the corpses that M was examining.
"Tell me everything you know about these people and this case." Jimmy requested to the forensics.

One of the Policemen that was examining the corpses picked up a notebook from the ground (that appeared to be his) opening it. Pointing a finger to somewhere in the notebook he stood up and began to speak: "These are three males all shot. They all seem to have clothes taken off of them with only underwear left on them. Also, next to one of the corpses we found a small piece of black plastic." The policemen then stopped speaking as he slammed his notebook closed.

"So that's it?" M replied while dropping another glance on the corpses. "Hm... What about those two guys outside. What did they say?" M questioned starting to get really curious about this case.

"Eh, let's have a look at this black plastic." Jimmy looked up at the policeman, intrigued.
When he saw the plastic, which was about the size of a thumb and had sharp edges, he thought for a minute.
"This must be broken from something." He stated, standing up. He then turned to see the door leading outside.
"huh..."

Another policemen holding only a note this time walked through the warehouse door just finishing interviewing the two males that were standing outside. "Listen to this. The both men outside are Ren and Moe. They said that they both and their friends - Yuto, Susumu, Hiroto were curious to see what's inside here. So after they entered this warehouse, somebody shot one of them. Scared, rest of four scattered around warehouse until they both - Ren and Moe heard gunshots. They both scared kept hiding until something knocked both of their heads knocking them out. Which is when we arrived to see them on floor, luckily managed to wake them up." Finished saying that, the policemen placed note inside his pocket thinking of who could have been the killer.

"But i wonder why would the person kill innocent men that entered the warehouse? And from where that black plastic could be broken from?" M said biting his own nail while thinking. Looking left and right M thought a bit before turning to one of the policemen asking a question: "Did you check the area? Maybe there is something important the murderer tried to hide."

The policemen nodded no offering M and Jimmy flashlights if they want to check out.

Jimmy listened to the inspector's ramblings before taking the flashlight that was handed to him.
"This shouldn't take long." Jimmy smiled, pressing the button on the flashlight that turned it on. A beam of light shot out, facing toward the ceiling where he held it vertically. He examined the roof...
"Anything up here?" He asked, squinting.

"No, i don't think so..." the policeman said that was examining the corpses just a minute ago as he was currently looking up himself with a wondering face curious himself too. All the policeman really didn't follow to match clues at all, all they did was just try to find clues since these policeman over here really had no idea how to solve a crime except for M. Some people even mistaken M for a detective,. He is pretty detective-ish really but it's not his job.

M meanwhile spent time flashing his flashlight at the surrounding area to find something himself.

"Explain the interior of the warehouse for me then." Jimmy asked whoever was nearest him as he flashed the light around, over barrels, the floor and the walls and anything else that could be seen.

Leonardo walked towards the warehouse. He saw his childhood friend, and the policeman. He looked and said. "What are the clues so far Jimmy?" Leo asked and looked around. He was asked to check this case out.

The policeman that recently said something to Jimmy took his small notebook opening it at last page and ripped out the page. Policeman then took a pen and holding with one hand the pen and paper, with other hand the policeman was shinning the surroundings with flashlight. Once he was done, the policeman placed flashlight down and started drawing a small top-down map on the note with pen. "This is it..." policeman handed the note to detectives.

Spoiler:

Meanwhile M walked to the policeman to also take a look at the note. Holding a flashlight in one hand, M shinned the flashlight to note so he could read it in this darkness.

"That was all I needed, thanks." Jimmy smiled, taking the map from the policeman. He heard footsteps behind him and he spun around to see...
"Ah! Leon!" Jimmy gasped, scrunching the note in his hands slightly. When he was asked about the evidence, he gave a small sigh.
"There isn't much at the moment, but I doubt we need much." Jimmy chuckled, shining the flashlight on the paper. He then turned his attention to the location where the broken glass containers were.
"I may need a summary of this case soon..." He whispered, stepping over to them, his feet getting splashed by water. He crouched down slightly.

Leo looked at the picture, "Broken glass containers, you dont think? Nah." Leo looked closed. The corpses were lain like a paw, it was odd. "Maybe they hid in boxes, or something." He said to Jimmy. "How where they killed again? I have a suspision."

(M, ask me on Twitter for my responses)

M turned to the new detective that appeared to be Leon from what he heard Jimmy say. Answering to his question, M said: "These three men were killed by being shot, two of their friends are standing outside that appear to be only survivors." The policeman standing near door of warehouse walked up to Leon giving him a note that he got from interview with the two survivors.

Policeman wrote:

The both men outside are Ren and Moe. They said that they both and their friends - Yuto, Susumu, Hiroto were curious to see what's inside here. So after they entered this warehouse, somebody shot one of them. Scared, rest of four scattered around warehouse until they both - Ren and Moe heard gunshots. They both scared kept hiding until something knocked both of their heads knocking them out. Which is when we - police arrived to see them on floor, luckily managed to wake them up.

The other policeman with his flashlight also turned to the broken glass containers that had water puddle near them. "Do you think the murderer was the one that broke them or were they broken before?"

Bump, my post is above

Leo looked. "Jimmy, it could be a possibility, those men got out unarmed. But only someone like Richard would think that, something just dosen't check out."

"Yeah, the method of murder." Jimmy stated bluntly, waiting for a response or the discovery of a new clue by the police.

Looking left and right M was currently seeing if there was something else other than the broken glass containers. After flashing the light to surroundings, M left the area slowly by walking away leaving only footsteps behind.
Suddenly a loud gunshot sound came from the doors. M was standing right in front of doors holding his gun and had shot the door lock to left from glass containers. Taking few steps forward it, M hit the door with his foot while holding gun in his hands for caution. The door was hit open leading to a small storage.

The storage had army uniform, scientist uniform, jeans and sweater, two pairs of gloves, boots and three pairs of shoes on the floor. Next to them was a cracked black camera and pistol.

"Argh!" Jimmy yelped upon hearing the gunshot. He almost jumped out of his skin, shining the flashlight in a careless manner toward M. When he saw that he had made the shot, he calmed down considerably.
"Geez..." Jimmy sighed with relief, stepping forward to see what M was doing.
A storage room?
Jimmy poked his head through the door, examining the room.
Then he saw the evidence.
"Ah, so that's how it was..." He grinned, raising an eyebrow.

Leo had jumped back a bit when a gun shot. He looked into the room. "This is how they snuck in."

"This place has no windows, only this single door, so how is it possible they got in the warehouse through this storage?" M said letting his gun down, but still holding it in one of his arms. He took few footsteps inside squatting next to the things that were on floor apparently all being in one pile. "Ha ha, looks like we have a camera here..." M took out a white glove from pockets that he placed on one of his hands. Lifting the camera with glove, M rotated it checking it from all sides. "A black, cracked camera made out of plastic."

Putting the camera down, M then turned to the clothes which were an army uniform, scientist uniform, and plain sweater with jeans.

"This is a simple case, but I fail to see the relevance of the evidence. Does the camera still work, for example?" Jimmy asked, crouching on the floor next to M. "And does it make a sound, perhaps have any film in it?" Jimmy scratched his head. "Why are there a bunch of sets of clothes here? These two guys may not even be who they say they are, especially if they put other clothes on to look like Ren and Moe." Jimmy suggested.