Mr Bayoh, a 31-year-old father of two, died in May 2015 after being restrained by six police officers on a street in Kirkcaldy.

A public inquiry has been examining the events leading to and surrounding his death, the subsequent police investigation, and whether race played a part.

However, Lord Bracadale stepped down as chair of the inquiry in October after the Scottish Police Federation (SPF) alleged that his private meetings with the Bayoh family had undermined his independence.

The SPF has argued that the £50 million public inquiry should now be replaced in its final stages with a fatal accident inquiry (FAI).

Sheku’s sister Kadi Johnson and his brother-in-law Ade Johnson will meet with Mr Swinney at the Scottish Parliament this afternoon.

The family’s legal team of Aamer Anwar, April Meechan, Rebecca Lyle and Shelby McQuade will also attend the meeting.

In a statement on behalf of the family, Mr Anwar said: “The family believe that as the public inquiry got closer to the truth, the more determined our criminal justice system became to sabotage an inquiry coming to an end.”

Criticising the SPF, he said: “Last week a Scottish Police Federation lawyer theatrically brandished a knife at a bizarre press conference, whilst sat next to a retired police officer Nicole Short who claimed ‘part of her died that day’ – but none of the spin can take away from the true facts.

“Sheku Bayoh was unarmed, did not attack the police first, did not spray them with CS and PAVA spray, nor did he repeatedly baton them. Within 75 seconds of arriving, up to six officers had Sheku pinned to the ground, handcuffed, with leg and ankle restraints applied.

“With up to half a tonne of police officers’ weight upon him, Sheku lost consciousness as he struggled for his last breath.

“His lifeless body in just a few minutes was covered with over 24 cuts, bruises, lacerations and a fractured rib. The postmortem made it clear that that sudden death occurred ‘whilst being restrained’.

“For the Bayoh family, this was not a death in police custody, but suspected police killing.”

Mr Anwar continued: “Peter Watson and the SPF with their demands for a fatal accident inquiry know that an FAI could not have looked at the conduct of the police, [the SPF], PIRC and Crown Office in the days, months and years that passed after Sheku’s death.

“The child-like denials of institutional racism by the SPF shows exactly why they do not want the public inquiry.

“The Bayoh family expect the First Minister to back their search for the truth, and nothing less will suffice.”