Lori Fullbright / News On 6 - A Tulsa County jury finds Marcus Cook, guilty of murder plus a gang related offense and having a gun as an ex-con. -Evidence showed Cook
![US Marshals Service agents and Tulsa Police officers arrest a suspected gang member during Operation Triple Beam II a two week crackdown against violent gangs May 2, 2011 in Tulsa, Oklahoma Stock US Marshals Service agents and Tulsa Police officers arrest a suspected gang member during Operation Triple Beam II a two week crackdown against violent gangs May 2, 2011 in Tulsa, Oklahoma Stock](https://c8.alamy.com/comp/EFX5NJ/us-marshals-service-agents-and-tulsa-police-officers-arrest-a-suspected-EFX5NJ.jpg)
US Marshals Service agents and Tulsa Police officers arrest a suspected gang member during Operation Triple Beam II a two week crackdown against violent gangs May 2, 2011 in Tulsa, Oklahoma Stock
![Tulsa Police na Twitteru: "Gang Unit officers giving back by handing out coats to children in the community. #tulsa http://t.co/6Bu7XIqKBk" / Twitter Tulsa Police na Twitteru: "Gang Unit officers giving back by handing out coats to children in the community. #tulsa http://t.co/6Bu7XIqKBk" / Twitter](https://pbs.twimg.com/media/B5jC-U9CAAEmaWB.png)