That night David didn't go home. He called one of his friends who was an associate researcher. He wanted to test the tendency of the poison that he had drenched his napkin with. He wanted to testify its limits and the damage it could cause so he directly went to one of his friend's research labs.
"You were right on time. We could collect enough content from the napkin for the sample to testify it. If it had dried on your way then I or anybody wouldn't have been for help." David's doctor friend replied.
"So, what is this thing? What harm can it inflict? I want to know the causes, Farris." David was anxious for answers.
"I can't say that it's poison," Farris speaks, shaking the contents of the sample in a container, and continues. "Though very small evidence of Clozapine is found which are not injurious to human health."
"But Farris... I saw the fly die on the food it was in." David complains.