The devastated father of a man who was mowed down and killed by an unmarked police car has spoken of his grief and outrage.

Professor Jens Holscher said he would be seeking legal action against Sussex Police after his 27-year-old son, Arthur Holscher-Ermert, died.

Prof Holscher, 60, had been holidaying in France with partner Sonia Drews when he received a phone call in the early hours of Sunday morning from police explaining his son had died in an 'accident' in Peacehaven, East Sussex.

Prof Holscher, the head of department for economics at Bournemouth University, said he has since been told by the Independent Office for Police Conduct (IOPC) that the police officer alleged to have driven an unmarked BMW into Arthur remains on duty.

Prof Holscher, who is originally from Germany, said: "It is so difficult to comprehend - I cannot believe it.

"I cannot understand what is happening at the moment. We are so disturbed - that is my little son and nothing is being done.

"We believe there is a serious fault on the police side and we will take legal action immediately. We haven't even had an apology - how low can you get?"

Ms Drews has been Mr Holscher's partner for two after the death of his wife and Arthur's mother, Karin Ermert, aged 63 in 2018.

Ms Drews, 68, said that the IOPC told them it would take six months to conclude their investigation, during which time there was 'no reason' to suspend the officer involved in Arthur's death.

She said: "How can it take six months? It is clear to see. There are eyewitnesses, videos, the police car has a camera."

Arthur and his older brother, Karl had grown up in Peacehaven and were well known by the community there.

She said that Arthur was full of hope for the future and had been saving to buy a house with his partner.

Ms Drews said: "He wasn't 80 years old. He was 27 with his whole life ahead of him. He was very happy. He'd found a new girlfriend and they were saving for a house together. He had so many plans for the future.

"When we got that phone call we just wanted to wake up, go for breakfast and call Arthur to say: 'We had a really bad dream but we are so happy you are still here.'

"We want justice."

Prof Holscher, who lives in Bournemouth, said he had no idea why the police had been pursuing his son at the time he died.