A 25-year-old man arrested on suspicion of the murder of Libby Squire has been released under investigation.
As previously reported, the body of a woman, later confirmed as Libby, was recovered from the Humber Estuary near Grimsby Docks close to Spurn Point on March 20.
A post-mortem examination was carried out before a formal identification of the 21-year-old, who was last seen just after midnight on February 1, was carried out.
The majority of the additional analysis stage is now complete, with a small number still pending final results. Further enquiries are continuing into the case.
Senior Investigating Officer, Detective Superintendent Martin Smalley, said: “Proceedings are active and I would remind people to please refrain from any speculation, as the investigation is very much live and continuing.
“There are further enquiries still being carried out and there are constant investigative developments and procedures that are ongoing.
“The majority of the additional analysis stage is now complete, with a small number still pending final results. A file is being prepared for the Crown Prosecution Service as the investigation progresses.
“My heartfelt thanks go out to Libby’s parents for their continued understanding and patience.
“They have been kept informed of all the developments in the investigation and they will always maintain our support.”