Police believe they have contacted “all families” of the 35 bodies found in a funeral parlour.
Legacy Independent Funeral Directors has been under investigation after officers recovered the bodies, as well as suspected human ashes, at its site in Hull, England.
Over 1,500 calls have been made to police by previous Legacy Independent Funeral Directors customers since the probe began, Assistant Chief Constable Thom McLoughlin said.
Police said detectives have been working “around the clock” since concerns were raised on March 8 “about the storage and management processes relating to care of the deceased at the funeral directors”.
Formal identification of the deceased took place at Hull’s city mortuary.
Senior investigating officers are working with “specialist experts” and advisors from the UK National Crime Agency (NCA) to confirm if human ashes have been uncovered as well.
Police previously arrested a 46-year-old man and a 23-year-old woman on suspicion of prevention of a lawful and decent burial, fraud by false representation and fraud by abuse of position.
The pair have been released on bail pending further inquiries.
Police said specialist search teams finished going through the premises on Thursday but a cordon is still in place on Hessle Road.
This week, one woman said she believed she kissed an empty coffin at her father’s funeral.
Billie-Jo Suffill, a mother of three from Hull, said she felt “physically sick” after not receiving her father’s ashes.
The 33-year-old lost 52-year-old Andrew Suffill in July 2022, and her brother Dwane Suffill (34) five days later.
She told the Daily Mirror newspaper: “I bet my dad was not even in the coffin – it was an empty coffin.
“I was kissing an empty coffin. When I think about it, it is disgusting. It’s like something out of a horror movie.
“I wonder if this will stop at 35 bodies. I think my dad is one of them.”
Legacy Independent Funeral Directors is owned by Robert Bush, according to UK Companies House.