A body found by the side of a road in Dudley could be that of a lorry driver whose goods had been stolen the day before, police said.
A passerby discovered the body in Vale Road, Derby End, in the early hours of 1 November.
Police believe it could be that of a 57-year-old Polish lorry driver, who had been travelling through the Black Country with televisions in his truck.
The lorry has since been found at a West Bromwich trading estate.
Det Ch Insp Steve Bimson said police did not know the exact events which led to the man's death, or what the circumstances were.
Post-mortem tests had proved inconclusive, he said.
"What we do know is that the lorry in which we believe he was travelling was found dumped on Vectra Industrial estate in Hill Top, West Bromwich, at around 10am on Monday.
"Some time before that his load was taken."
He said police thought someone had robbed the vehicle in another location and then driven the lorry to the trading estate, where it was dumped.
"It's not clear how the deceased man ended up in Dudley, however we know that the lorry travelled through Oldbury over the weekend.
"The lorry would not have been able to pass along Vale Road, and so how he came to arrive there remains unclear," he said.
"We do know that the lorry was parked up somewhere near the town centre from Saturday 30 October into Sunday evening.
"It is known that the man went shopping in Oldbury during that time and so it is unlikely he had walked far from wherever that lorry was parked.
"We want to hear from anyone who saw it during that time."
Police are also trying to trace the LG LCD flat screen televisions.