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Police: 3 killed after man learned victim was from Puerto Rico

MILWAUKEE -- Authorities say a Milwaukee man shot and killed three people on March 6 at his apartment, asking one victim about his background before killing him, reports CBS affiliate WDJT.

Dan Popp, 39, is charged with three counts of first degree intentional homicide as well as one count of attempted homicide. Popp is accused of using a rifle to kill three people -- all tenants at the apartment building where Popp lived.

According to the criminal complaint, the night of the shooting he offered one of his future victims a beer and asked where he was from.

Jesus Manso-Perez responded he was from Puerto Rico, according to the criminal complaint.

Manso-Perez's son told police that minutes later he witnessed Popp saying, "You guys got to go," before allegedly shooting Manso-Perez in the head, according to the criminal complaint. Manso-Perez's son was also shot and wounded, according to police.

Popp then allegedly forced his way into the apartment of Phia and Mai Vue and their four children. Police say Popp shot Phia Vue, before dragging Mai Vue to his own apartment, where he shot and killed her.

On March 9, the suspect's attorney asked for a competency hearing before proceeding with the court case.

"From what I understand, back in 2008 he spent a brief period of time at the Milwaukee County Mental Health Complex. And he's also being treated at the VA for some mental health issues," Christopher Hartley, Popp's attorney, said.

Popp was remanded to the county jail in lieu of $150,000 bail.