“We were able to make an arrest after doing a stakeout at an Akalla apartment over the course of the day,” said Klas Jensgård of the police to daily Dagens Nyheter (DN).
On Saturday, investigator Dan Östman told the TT news agency the police are completely sure that they have caught the right person.
The robber, who is in his thirties, was taken by police from the suburb of Akalla just north of Stockholm. He is suspected on probable grounds of aggravated theft and concealment of stolen property.
Two other men are being held on suspicion of protecting a criminal.
The inebriated victim – referred to in the Swedish media as Johnny, 38 – was returning home after a night out with his friends when he fell down on the tracks at the Sandsborg metro station south of Stockholm.
The robber jumped down on the tracks and emptied Johnny’s pockets before coldly walking away from the scene.
Johnny was severely wounded when a train hit him soon after the robbery.
The incident, which occurred on Sunday morning, was caught on surveillance cameras and was featured on the TV show Efterlyst (Wanted), which aired on TV3 on Wednesday evening.
Tips from the public have since helped the police catch the suspected robber.
“A number of tips have concurred and we identified a location and a residence where this person was. He matches the images,” said Dan Östman of the Stockholm police to DN.