Police officers will have to answer questions about a number of issues as part of a police inquiry into the death of a man who died in a Belfast jail.

The Independent Police Complaints Commission has asked the Independent Police Authority for a criminal inquiry after it emerged a man in his early 20s died in custody after he was found to have a severe case of post-traumatic stress disorder.

Mr Murphy’s death is the latest in a string of police deaths in the north of the island.

In April, the IPCC said it had concluded that the death was not suspicious.

The force is also investigating a complaint that officers were “overly” inquisitive about Mr Murphy.

“The IPCC has received complaints that the officers were asking questions and making comments about the deceased and his death which were highly inappropriate and in breach of protocol,” it said in a statement.

“We are conducting an investigation into this matter.”

An IPCC spokesperson said officers were allowed to ask questions during questioning.

“Answering a question can include a number, but not all questions can be asked at the same time,” she said.

“It is the officer’s decision whether to answer the question.

The IPCC will then provide a written summary of the answers.”

The IPCC was set up in 2005 to look into all serious incidents involving the police, and the force has received a total of 692 complaints in the past five years.

In February, a police officer in a different area died after he collapsed while in custody.

The officer’s partner has also been investigated for an alleged breach of a court order.