"Yes" Teera said
"What a coincidence" Zian said surprised
"Really! I can't believe it. I think we should check it" I said because I felt this is more than a call.
"Hmm, maybe you are right. I think we should investigate it. Who knows if this could lead us to the killer?" Teera said
I nodded and called my friend Leon who is in the police department and he could help us in tracking the phone number.
"Hello" I heard his voice
"Hello Leon, I am Jia from Expert Enquiry Detective Company" I said
"Oh! Hi Jia. How are you?" He asked
"I am fine" I said
"Tell me how can I help you?" He said
"Actually I want you to track a phone number" I said
"A phone number? Is everything okay?" He asked in a concerned voice
"Yes but I suspect this phone number is not normal. Something is fishy" I replied
"Okay, you can come to my office and we will track it" He said
"Alright" I said and cut the call

*in Leon's office*
We entered his office and he was sitting on his chair doing work on his laptop.
"Hello Leon" I said
He looked up and said " Welcome guys"
He got up and shook hands with us.
"Come and have a seat" He gestured at the chairs and we sat down in front of him.
"So you were telling me about a phone number right? He asked
"Yes. We want to track it" Teera said
"Can I know why? He asked
"Last night when I was about to sleep, I got a call and when I picked it up, no one answered and the same thing happened to Teera" I explained
"And we think it might act as a clue in our case" Zian added
"Hmm...that's wierd" Leon said shaking his head "But don't worry, we will track it"
We all nodded and he took us to the tracking room. He sat there in front of a big computer and started doing something.
"Give me the phone number" He said and I gave him the number
He put the details and we waited for the computer to track it.
After a while, a board popped up saying that this number doesn't exist.
"What the hell" I said
"Looks like the user has destroyed the SIM of the phone and that's why this number doesn't exist" Leon said
"But isn't it too uncanny?" Teera questioned
"It is but this number doesn't exist so we cannot track it but I will keep an eye on it" Leon said
"Thanks Leon for helping us. We should be get going now" I said
"It's fine Jia" Leon said smiling
We smiled and went away from there. I was still not satisfied with whatever happened inside. We walked till the car and suddenly I saw that Zian's handkerchief had fell from his pocket. I picked it up and saw letter 'R' written on it.
"Hey!" Zian said and took the handkerchief from me
"Uhh...it fell from your pocket so I picked it up to give it to you" I said shocked
"Oh! Thank you" Zian said and instantly put it in his pocket
We sat in the car and Zian started driving. I still processed everything like the phone call, breaking of the pots and Zian's unusual behaviour when I saw his handkerchief.

'Is there any connection between all these?'