Ayodeji was fatally stabbed at 12:30pm on 4 November in Samos Road in Bromley.
The 23-year-old was arrested in the morning on 12 November on suspicion of murder and remains in custody in a south London police station.
Two men aged 19 and 21 had previously been arrested in connection to the stabbing and have been released under investigation.
A 16-year-old girl has also been bailed until early December after being arrested on 4 November on suspicion of murder.
Detectives from the Homicide and Major Crime Command, led by Detective Chief Inspector Mark Cranwell, say:
“This attack took place in the middle of the day, in broad daylight in a residential street. It goes without saying that this incident would have stood out in what would normally have been a quiet environment.
“I am continuing to appeal to anyone who was in the area on the afternoon of Sunday, 4 November and saw this attack, or the events surrounding the attack, to come forward and speak to police. This includes trying to establish if anyone was with Ayodeji when he was attacked.
“My officers are making progress as to why Ayodeji was in the area, why he came to be attacked and who was responsible for his murder, but we need information from the public to assist us in keeping the momentum of this investigation moving forward.”
Any witnesses or anyone with information should contact the incident room on 020 8721 4054. To remain anonymous please call Crimestoppers on 0800 555 111.
