(IDAHO FALLS) Idaho Falls Police arrested 26-year old Russell Keith Poulsen early Tuesday morning after he allegedly shot a 24-year old woman in the chest. Police arrived at a residence in the 21-hundred block ofLogan Drive just after 3:30 in the morning. Officers indicate that Poulsen had gotten upset when he found his roommate and the woman having sex in the home. After a confrontation, Poulsen apparently retrieved a .22 caliber handgun from his bedroom. The woman began fighting with Poulsen in an effort to take the gun away. During that scuffle, the gun fired, hitting the woman in the chest. She is recovering at Eastern Idaho Regional Medical Center. The investigation continues.