OKLAHOMA COUNTY, Oklahoma - A man was arrested on multiple complaints including manslaughter, after authorities said he had marijuana in his system when he caused a deadly collision in Oklahoma County, back in December, 2014. 

According to the Oklahoma County Sheriff's office, the collision happened on December 1, 2014, in the 900 block of S. Anderson Road. Matthew Allen Kupczynski, 26, reportedly drove into oncoming traffic and crashed into another vehicle, driven by 56-year-old Lowell Wayne Allen. 

Allen was killed as a result of the crash.

When Kupczynski was taken to the hospital, he was found to have nearly five and half grams of marijuana on him, according to the Sheriff's office. Blood results proved that Kupczynski had marijuana in his system at the time of the crash.

"This was a very unfortunate, and tragic event that was preventable", said Oklahoma County Sheriff John Whetsel. "The driver who caused this crash was driving in a reckless manner, with marijuana in his system and in his possession. It's a reminder of why we put so much effort into getting dangerous drivers off the roads".

On Monday, March 16, the Oklahoma County Sheriff's Office Warrant Team arrested Kupczynski at his home in the 7500 block of N. Harrah Road. He was booked into the Oklahoma County jail on complaints of first degree manslaughter, possession of marijuana, driving with a suspended license, and driving left of center.

Kupczynski is currently being held on $11,500 bail.