Just hours before Rupnow was named as the suspect in Monday's mass shooting in Madison, a social media user claimed to have spoken with the 15-year-old's alleged boyfriend.
"This remains an active and ongoing investigation," police said in a statement. "More information will be released as it is available. We currently need people to avoid the area."
Mangione was arrested at a McDonald's in Altoona, where he reportedly gave local police a fake ID and began trembling when questioned about recent travel to New York.
A breakthrough came when Mangione, 26, briefly removed his mask while trying to flirt with someone at a Manhattan hostel, providing a clear look at his face.
Friends suggest that the shared tragedies between the Pistorius and Greyling families brought them closer together, and their relationship symbolizes a new beginning for both.
Mango was founded in 1984 by Andic, a Turkish-born entrepreneur, who opened his first store on Barcelona's famous Paseo de Gracia, with help from his older brother Nahman.