Rhys Collings, from Bury St Edmunds, Suffolk who went into a village store with a knife and threatened a shop assistant has been given a suspended sentence.
A third man, aged 18, has been arrested on suspicion of murder on Saturday after the fatal stabbing of a 23-year-old man in Lincoln on Thursday night.
Two other men, aged 23 and 24, remain in police custody for questioning after also being arrested on suspicion of murder on Friday.
The body of the 23-year-old stabbing victim, who has not been formally named, was found with knife wounds caused in Coleridge Gardens in the St Giles area of the city at around 10.48pm on May 27.
The park area where the body was found remains cordoned off on Saturday. | Photo: The Lincolnite
Lincolnshire Police believe the fatal stabbing happened after an altercation in the area of Coleridge Gardens, Browning Drive and the park nearby after 10pm that night.