[ CW ] Introduce an object that is not used later and leaves me wondering what it is .

`` Give me the damn thing,'' Roger stuttered while hold the terrified woman at gunpoint. 
 
 `` I do n't have it,'' she screamed, but her eyes betrayed her lie as she stared over his shoulder. Roger turned in the direction of her gaze and saw it sitting on the shelf. It sat there, with its strange markings glowing orange in the pale blue apartment lighting. He was captivated by the glow and with a satisfied smile he reached for it. 
 
 Karen took the opportunity and reached for a piece of broken coffee table from the ran-sacked apartment. As Roger reached for his treasure, she struck him in the back of the head. The object's markings turned red and glowed more intensely as the makeshift club came down on Roger's head again; and again. As his body lay feet from his desire, Karen stepped over him and grabbed the item. Its color cooled to a bluish glow as she turned to walk out of the apartment. 
 
 Karen walked out of the door that Roger had forced his way through and into the hallway. It was late and she's needed to get out of here before the police arrived. She checked her watch and never saw the figure to her right. She probably never heard the gunshot before her head exploded and her body fell on to the hallway floor, the object still clutched in her hand. 
 
 David reached down and took the long cylinder from her hand. It was glowing orange again and he knew what that meant. He tucked it into a haversack and sprinted down the hallway. The elevator made its usual bing as it opened. Detective Fronsom stepped out and David ducked into an alcove, out of sight. 
 
 The police crawled the hallway and checked out the apartment. David snuck away as they fumbled over Karen's body. Once on the street, he could n't help but cracking open the sack and peeking at the object. It glowed blue. David breathed a sigh of relief, but as he strapped the bag closed, he saw the color change to a pale green. He froze. Looked up and saw the truck moments before it separated his legs from his torso. 
 
 It rolled out of the bag. It stopped at a pair of feet. A gloved hand reached down and picked it up. `` Thank you David. We've been looking for this. ``
