Callum Plaats, of no fixed abode, was arrested yesterday and has been charged with murder.
Plaats has been remanded to appear before Ipswich Magistrates Court tomorrow, Wednesday July 25.
Police also arrested a 19-year-old man from Barking in Ipswich on suspicion of the murder of Tavis Spencer-Aitkens. He has also been further arrested on suspicion of possession with intent to supply drugs.
He is currently at Martlesham Police Investigation Centre for questioning.
In early June, 22-year-old Aristote Yenge from Ipswich and a 16-year-old boy from Colchester (who cannot be named for legal reasons) were both charged with murder.
Two other men aged 20 and 19, arrested in early June on suspicion of conspiracy to murder, remain on bail until Monday 30 July.
A Suffolk police spokesperson said: “Detectives are continuing to appeal for anyone with information about the murder, especially anyone who witnessed the attack or anything suspicious in the area immediately prior to it or directly afterwards, to make contact.
“Anyone with information about this crime is asked to contact the Major Investigation Team, preferably by uploading information to the online portal: https://mipp.police.uk/operation/804 or failing that by dialling 101 and quoting reference 30192/18.
“Alternatively you can contact the charity Crimestoppers anonymously on 0800 555 111.”
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