The Pima County Sheriff's Department has opened an internal investigation into a disturbing video obtained by KOLD News 13 in Tucson, Arizona that shows a deputy tackling a 15-year-old quadruple amputee to the ground.The video was captured several months ago by another teenager in a group home, and when it was presented to the sheriff's department by the news station, the department said it had no knowledge of the footage.In the video, the deputy can be seen entering the kitchen of a group home for minors. KOLD News 13 reports that the teenager had kicked over a trash can and verbally threatened a staffer at the home, where he has lived since being abandoned by his family.The 15-year-old and the deputy can be heard yelling at each other in the video, and the deputy pushes the teenager into the ground and tells him to calm down before arresting them both on disorderly conduct charges.The deputy involved has been placed on administrative leave.Visit Insider's homepage for more stories.A disturbing incident caught on camera at a group home for minors in Tucson, Arizona several months ago was brought to the attention of the Pima County Sheriff's Department, which has now opened an internal investigation into the actions of the deputy shown in the footage.KOLD News 13 reports that the police were called to the group home when a 15-year-old quadruple amputee, shown in the video shirtless and on the floor of the facility's kitchen, knocked over a trash can and verbally threatened a staffer. The teenager has been living at the group home since being abandoned by his family.The deputy, identified by the outlet as Manuel Van Santen, has reportedly been placed on administrative leave while the investigation is underway. A lawyer for the teenager said that he will likely pursue civil litigation.When the officer arrived, at least two other people in the kitchen, including another minor, began filming the incident. The video was provided to KOLD News 13 by the Pima County Public Defender's Office.In it, the deputy can be seen verbally confronting the 15-year-old amputee while standing above him. The public defender in the news segment says the officer also threatened both him and another teenager who was filming.Before going on to arrest both teens on disorderly conduct charges, the deputy can be seen forcibly wrestling the amputee into the ground. Later, he gets up and arrests the teen filming, pushing his head into the wall.On Thursday, KOLD showed the footage to the sheriff's department, and was told the department had not seen the video previously, nor was it aware of its existence. A representative of the department said a number of outcomes could occur as a result of the investigation, but did not specify further.Read more:A Texas court blocked Rodney Reed's execution after Kim Kardashian West and Oprah voiced support for the death row inmateMeghan Markle is accusing British tabloids of making up 'untrue' stories about her, including expensive home renovations with taxpayers' money2 students at Harvard went viral with an incredible campaign rap. Then they won the school's election.Join the conversation about this story Click here to read full news..