Spencer, an employee in a chemical factory, found a puddle shaped like a body while at the CSI team came in, they already have their first three suspects: Spencer, Holly, another colleague, and the manager, Dean told that a certain employee named Philip has gone missing, the team discovers that the acid puddle was from Philip's next search out over Dean Colton's office. From the evidence, Philip was found to be lazy worker. He also threatens Dean to make a complaint through an agency, which can put Dean's office in jeopardy. Then, they went through Holly's Office to investigate some files. In the evidence found, the files point out that they must search out over the shelving unit over the place where the puddle is. Dust voids were found and this proves that the tub full of hydrochloric acid hits Philip and pours onto his body. A nail with a strand of hair, which belongs to Spencer, was also found above which leads him to involuntary manslaughter. He did this when taking a nap above.