An internal investigation into the assistant police chief in Tahlequah led to the recommendation to fire him.In a release sent on June 15, Police Chief Nate King said they got a call about an incident at Burnt Cabin Marina on Lake Tenkiller back on May 15th.The call stemmed from someone slashing an inflatable at the Boat and Bar Grill. The owner posted surveillance video on the Facebook page days after the incident: After speaking to people and …