A police investigation into the deaths of four people in a countryside crash has now concluded, a coroner has been told.
Teenagers Alesha O'Connor, Rhodri Miller and Corey Price all died in the two-vehicle crash, which also killed pensioner Margaret Challis on the A470 near Brecon.
In the aftermath of the crash, police arrested seven teenage boys on suspicion of dangerous driving - however no charges have yet been brought.
Sergeant Gary Jones updated coroner Andrew Barkley on Dyfed Powys Police's progress on the fatal crash at a pre-inquest hearing in Brecon.
He said: "We have now completed our inquiries into this tragic collision. All material was submitted to the CPS on July 17.
"Do we have any indication at how long this will take? I expect to hear a decision from the CPS within the next four to six weeks."
The fatal crash took place near Storey Arms in Brecon in March.
It is believed 17-year-old new driver Rhodri was behind the wheel while taking girlfriend Alesha and schoolfriend Corey to a camping trip with friends.
Ms Challis, 66, of Merthyr, was in the other car and was being driven home following a night out at the theatre.
All four deaths sent shockwaves through South Wales and prompted calls for more safety measures on the road where the accident occurred.
Mr Barkley adjourned proceedings and tentatively relisted the case for two months' time.