WHO KILLED HER?

Its a quiet morning, a knocking sound is heard on Dalton's door. Clark opens the door to see who is knocking. He looks so scared after knowing the person who was knocking on the door. Guess who was it , it is the imposter Dalton. Clark is so surprised to see the person whom he ordered to kill being the one who was knocking on the door. Now Clark is so curious to know whether he is a person or a ghost. So he asks him so scaringly the reason why he came to Dalton's house but he couldn't answer his question and couldn't say any word. A voice is heard on the stairs telling him that he was the one who wanted to know the third person who was on the crime scene thr day his wife died. And now it's the time for him to know the truth . The voice seemed so familiar to Clark ,so he decided to look behind to see who was it and it was not a surprising to him because the person who was standing on the stairs was Dalton. Dalton steps downstairs and Clark is in rush to know who is that person and why Dalton is still alive because his cutthroat sent him a message which confirms that Dalton was dead. Now it's time to know the truth that Clark didn't know and which some of us also didn't know about the death of Clark's wife. Everyone in the house has gathered now in the living room. Dalton sits in the sofa set and he calls Clark brother in law, now Clark is confused he is asking himself why Dalton called him brother in law. Let's also find out whether Dalton has decided to revile his true self to Clark and Sheila. "Brother in law is what you called me yesterday isn't it. Well I must say that you're so genius that you almost understood me but you're so easy to fool that I tricked you in your own game and you gave me all the information I needed". Now Clark asks so surprisingly and scared. " Are you Dalton ?" " Of course am Dalton ,your brother in law whom you accused of killing his sister. I must say that my ex brother in law and my ex girlfriend are so good in hiding the truth but it's a pity that you cannot hide the truth for a long time". Sheila asks so scared. " If you're Dalton then who is he?" " Am coming there my dear. But we have to know the truth that you two didn't know all this time. Let's start with four years back when you two killed my sister and decided to put all the blame on me". " You're wrong we're not the one who killed her". Sheila tells Dalton with a soft voice. "Wow, I must say that my dear girlfriend hasn't changed a bit. You're still good at making an innocent voice so that a person can feel pity for you but not today. You used that voice 4 years back to deceive me but I won't let that happen. Am not the same Dalton you used to lie all the time. Am a changed person now, let's go back to business. On the day you killed my sister was the day we wanted to find out the truth about the two of you. My sister told you that he was going for a business trip and I told Sheila that I was going to assist her to the business trip. We knew that you won't doubt us since we we're business partners. Fortunately you did fall off from your trick. After I left home ,Sheila called you and told you that I was not home and you told her that your wife was also not home. At first you decided to meet at my house but Sheila told you that we have a lot of neighbors they might tell me about your affair so you decided to meet at your house which was on a private land. You're wondering how I knew about that ,you're so stupid Sheila and at that time you was so excited to meet your lover that you did take time to see whether I was gone for sure. When I knew about your plan, I called my sister and told her your entire plan so she decided to go and hide in the house. When you two reached home ,you thought that there was no one in the house so you took your time to do everything that you wanted. My sister tried to call me several times to tell me to reach in time before you two are gone but I couldn't pick up my phone because at that time I was in traffic jam I didn't hear her calls. When she called me and I was not picking she decided to leave a message telling me that she is going to confront you by herself but I failed to stop her. Do you know why? Because I knew that you couldn't do anything to her,what I didn't knew that you will be the ones to kill her. The jam was so heavy that I reached at your home when it was so dark and it was raining outside. I knocked on the door but there was no one responding and the house was so quiet. I decided to use the spare key to open the door. At the time I entered the house was full of darkness so I couldn't see anything. I lighted the touch and my first sight landed on my sister who was lying in blood at that time. I tried to check her vessels whether they were transporting blood. Unfortunately, she was already dead but she was holding something in her hand and she was holding it so tight. Guess,what was it? It was your marriage ring ,Clark. At that time I knew who killed her. I left quickly so that the police couldn't find me at the crime scene. At that time I went back home,I found Sheila when she is already home. I didn't do anything that can show that I know what happened. When Sheila asked me why I came back ,before answering her we heard someone knocking on the door. I opened the door and it was the police, they didn't ask anything but put the handcuffs on my hands.