Serial Explosions, the third house. (Open)

"That is interesting! Obviously someone has been here, that knows the layout of these homes and they must have been well-aquainted with the victims to be able to get in and investigate! Either that or they broke in the first house, planted the bomb and ran away but did the same thing for the rest of the homes."
Jimmy pondered this.
"Anything else you've noticed while investigating?" He asked.

"No... nothing." the policeman said putting notebook back in shoulder bag.

Once M heard policeman saying that, he slowly walked towards Shun's house for an investigation. "Let's see if my guess is correct..." M said quietly at himself finally arriving at Shun's house. He took white gloves from his suitcase putting them on hands and soon entered the house ready to investigate.

"Then I have a feeling..."
Jimmy quickly turned on his heel and dashed out of the charred remains of what was the front door. He turned to the left and leapt over where the hedges would have been, rolling upon the grass in front of Shun's house. He picked himself up...

M heard something outside, not really sure what could it be, maybe the murderer fleeing form the crime scene. M quickly ran out of the front door looking at the creator of the noise.

"Oh, excuse me. I just saw someone run past, through the garden. I was going to catch them but they were too fast for me." Jimmy bluffed, pointing in the direction of where the street turned left. "By the time I got here he was already over there!"

"You serious?!" M looked at Jimmy with a "Oh really" face. With one eye opened wider than the other and mouth open but barely.

"Yeah, you should go see if you can catch up to him..." Jimmy bent over, pretending to pant from exhaustion of running. "You're faster than me I bet! Even if not, you have a camera for pictures...?"

"No..." M sighed sliding hand in his gallant white shirt, "but i have a gun." With a evil smile M had pulled out a shiny revolver. He then soon turned around to direction Jimmy pointed and started running to see if he can find anyone suspicious.

"Good." Jimmy whispered to himself as M dashed away to catch up with his makeshift criminal. Jimmy immediately set to work, dashing into the home, silently but quickly which was made easy due to the door being open. He dashed through into the kitchen and looked at the spot where the bomb was found in the last few houses and he saw...

Not a single spot showed any presence of bomb...

Zack sighed and walked through the house. looking down as he investigated the house, scanning the area for anything out of the ordinary, he wondered.
If there wasn't a bomb in the kitchen, there could be one in the heating systems, he walked downstairs in an aim to look for the houses' gas reservoir, he flicked the lightswitch, looking around, and he found...

"Bedroom!" He gasped, turning around and running out of the kitchen to dash up the stairs. At the top, he barged open the bedroom door to reveal... *woo suspense etc etc*

There was a gas tank right under kitchen in the heating systems...

A shiny black glass stand out very much in the ventilation shaft right above the bed at bedroom. It was round and the frame around the black glass looked like plastic.

"Oohkay, tricky, tricky...!"
Jimmy called in the bomb disposal experts using his phone. In the meantime he was waiting for them to investigate, he ran down to the cellar, where he met up with Zack.
"Sorry about leaving you behind but you know how I am with cases!" He grinned.

The bomb disposal experts slowly and very carefully examined the ventilation shaft and the bars that covered it. After uses of small flashlights and mirrors, they took out the item they found in it. "Detective!" one of them shouted running trough the first floor of house without knowing where Jimmy is. He only heard him go downstairs.

"Yes?!" Jimmy apologised to Zack before dashing upstairs to meet the disposal expert.

"It's not a bomb..." the disposal expert said reaching his both hands to Jimmy showing the item. It was a camera... not big, but not very small either. The black glass was the part which records and takes in information.

"Impossible."
How on earth did the houses explode then? There must be some sort of trigger that had not yet been found! Either way, the camera would serve as useful evidence.
"What was the camera looking at?" Jimmy asked as he beckoned the expert to follow him into the cellar where he was about to look around more.

"Come upstairs..." The expert said with a serious look and then ran upstairs back to the bedroom.

Jimmy sighed and turned around to dash back upstairs to the bedroom again...

The expert then pointed to the radiator which was right at opposite side of the ventilation shaft. "It isn't confirmed yet, but we noticed it facing the radiator when taking out the camera. We can confirm it after few hours." The expert said walking slowly to the radiator.

Zack followed him and sighed, he had a rather plain look on his face, he was skeptical on how this could work. Again, he was still thinking some form of projectile explosive.
He didn't speak as he walked into the bedroom.

"Huh?"
The radiator?
"I would actually stay away from that if I were you." Jimmy advised the expert. "It may be the bomb, the camera must be waiting for some sort of trigger for it."
He pondered for a moment.
"Like gas."
He then turned to Zack, asking him what he found downstairs.

"That's what i suspected too..." the expert said taking the camera and then went outside of the room. But no... he stopped just before going out. "Maybe this camera has fingerprints on it... i'll give it to police station lab so they can search for fingerprints and ask them if they can crack the video what this camera filmed."

There were still other experts standing in the room and waiting for orders.

"Well, this looks like a central heating system, and central heating systems run on gas...So I presumed there was gas reservoir downstairs, I didn't find much though." He announced, sighing, "Shall I go take another look?" He asked, adjusting the gloves on his hand.
"It's strange...Why would you put a bomb on a radiator? It's just full of boiling water..." He thought out loud.
"The real gas reservoir is found in a basement or in a storage room..." He spoke, well, this was what he usually saw anyway.