Two more state troopers associated with the Karen Read case are now under internal affairs investigation. 

The troopers are Lieutenant Brian Tully and Sergeant Yuri Bukhenik, and the investigation is over possible violations of department policies. 

State Police are confirming the investigation, and say both remain on full duty at this time. 

The troopers are based at the Norfolk District Attorney's office, which is prosecuting Read over the death of her Boston cop boyfriend John O'Keefe.