A DETECTIVE leading the investigation into a Birkenhead man's death has admitted mistakes were initially made in establishing the cause as a murder probe continues.

A new witness appeal has been launched into the passing of Darren Poole, whose body was found at his home in Dingle Road on August 14, 2015.

The 37-year-old's death was treated initially as not being suspicious.

But a postmortem established he had died as a result of "blunt force trauma" to the head.

Police believe he was assaulted inside the house.

A 42-year-old man from Tranmere arrested on suspicion of murder in March was released pending further inquiries.

A team of five detectives is now involved in the investigation.

Detective chief inspector Paul Denn from Birkenhead CID told the Globe: "The investigation is progressing.

"We are looking at a number of lines of inquiry despite the passage of time.

"Clearly there were mistakes made at the beginning and we started the re-investigation into Darren’s death some 12 months after his passing unfortunately.

"That's presented us with significant challenges and that's why we are looking for anyone with any evidence no matter how small to come forward.

"Darren's death was treated initially as not suspicious and unfortunately mistakes were made by a number of agencies.

"We are looking to put those right.

"I am appealing for witnesses within the community to come forward to try and assist us with that investigation.

"No matter how much information they have got please come forward. It may help us.

"Darren has got a loving family who are obviously going through a lot and I know they are very supportive of this investigation.

"They would also encourage people in the community who know, potentially, who was involved in the death to look at their own consciences, come forward and give us the information we desperately need".

Mr Denn continued: "His cause of death was given by a pathologist as blunt force trauma.

"We are trying to establish what went on up to his death.

"I am convinced there are people out there who knew Darren and know some of the events that led to the loss of his life".

Anyone with information should contact Merseyside Police on 0151 777 2265 or Crimestoppers anonymously on 0800 555 111.