Abstract: At 3:30 p.m. on August 12, 2016, Employee #1, employed by a construction subcontractor, was working at a multifamily construction project. He was primarily responsible for framing doors and windows. Employee #1 was framing a door using 2 by 4 wood members and a nail gun. As he held a wood 2 by 4 with his right hand and the gun with his left hand, he prematurely and inadvertently released the gun's safety, firing a nail through his right index finger. Employee #1 reported the incident to his employer's safety inspector but did not seek medical care for the nail puncture. The next day, his hand was swollen, and Employee #1 was admitted to the hospital, where he was treated for a hand infection. Employee #1 remained hospitalized for one week. The subsequent investigation determined that Employee #1 had begun carpentry training in May 2016 when he was hired by this employer.