Any members of the public who sees him are urged not to approach him and to instead call 999.
At around 10.10pm last night (Friday, July 19), three men absconded from Springfield Hospital, Glenburnie Road after smashing a glass door.
One man was detained at around 12.45am today (July 20) at a residential address in south London.
He has been returned to hospital.
Ramon Martin, 31, has since been detained in the Clapham Junction area and is being returned to the hospital.
The other man being searched for has been identified as Adil Maxamed, 20.
He was in hospital under the Mental Health Act.
At 10.35pm last night, the two men got on a Northern Line train in Tooting Bec station.
Enquiries are ongoing and Maxamed has links to Kingston.
Anyone who may have seen either of them is asked to call 101, ref 8713/19jul.
For an immediate sighting, police ask that you dial 999.