A man who was found dead in a house in Washington on Tuesday has been named as 31-year-old Gavin Moon.
Mr Moon's body was found at an address on Trafalgar Road shortly after 2pm. Emergency services attended and found he had suffered a fatal stab wound.
Police are treating his death as a murder investigation and detectives from the Homicide and Major Enquiries Team (HMET) are looking into the case.
Mr Moon's family paid tribute to him on Thursday. They said: "Gavin was a devoted dad to his children and a loving son. His unexpected loss has hit us hard.
"We would request that our privacy is respected at this incredibly difficult time as we come to term's with Gavin's death."
A 28-year-old man remains in police custody. A 24-year-old man has been released with no further action to be taken.
Commenting on the case, Northumbria Police Detective Chief Inspector John Bent said: "Our thoughts are with Gavin’s family at this incredibly difficult time, and specialist officers continue to offer them any support they need.
"We are committed to finding out the circumstances behind Gavin’s death, and an experienced team of detectives continue to map a chronology of events which ultimately led to this tragic incident."
Seeking to reassure the local community it was still safe, Superintendent Paul Milner said: "My message to the community is one of reassurance. Crimes of this type are not common in this area, and we will continue to leave no stone unturned in this investigation.
"Deaths such as this have an inevitable impact on the local community, and an increased police presence will remain in the area as officers carry out enquiries and reassure members of the public."
Anyone with information is asked to contact police on 101 or contact Crimestoppers anonymously on 0800 555 111.