Police are appealing for information about the location of Ryan Filby, 20, in connection with the death of a man in Writtle.
Filby, from Chelmsford, has links to Braintree and Witham, but may have travelled outside of Essex.
The appeal follows the death of Liam Taylor, 19, from Chelmsford, on Friday January 31.
Officers answered reports that two men had been stabbed outside the Rose and Crown pub in The Green, Writtle, at about 8pm in what is believed to have been a targeted attack.
An 18-year-old man arrested on suspicion of murder and possession of drugs and a 21-year-old man arrested on suspicion of murder and attempted murder have been released on bail until Tuesday February 25.
Anyone with further information is asked to contact the North Major Crime Team on 101 or you can visit: https://mipp.police.uk/operation/4201020120P24-PO1.
Alternatively, contact the Crimestoppers charity anonymously on 0800 555 111 or use the anonymous online form at Crimestoppers-uk.org