Police are looking for a man they say is behind two robberies in the Bronx.
They both happened in the same apartment building in Morrisania.
Security captured the most recent incident, earlier this month.
The robber approached the victim, who uses a walker, from behind, puts him into a chokehold and drags him into a staircase.
He took the man's wallet and cellphone.
Police say the same suspect attacked another man in the same way back in February.
Anyone with information on the case should contact the Crime Stoppers hotline at 1-800-577-8477, or text CRIMES and then enter TIP577, or visit www.nypdcrimestoppers.com.