CHICAGO (CBS) — A Palos Park homeowner shot and killed a 19-year-old Indiana man during a home invasion Tuesday night, and now the teenager’s alleged accomplices are being held responsible for his murder.

Authorities say five young adults were part of the home invasion in Palos Park, near 118th and Will-Cook Road.

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Prosecutors say it started as a set-up. The homeowner had paid for sex twice before with a 19-year-old woman. But this time, she planned to rob him, with the help of her sister and friends.

So prosecutors say the young woman and a friend went in the home as three others waited outside.

Brandy Marshall, Sarah Risner, Paige Marshall. (Credit: Cook County Sheriff)

Brandy Marshall, Sarah Risner, Paige Marshall. (Credit: Cook County Sheriff)

But the homeowner caught a glimpse of one of the others outside and got his gun.

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When 19-year-old Anthony Dalton of Cedar Lake, Ind., confronted the homeowner with a knife, the homeowner shot Dalton and killed him and shot a 23-year-old man in the leg.

The Cook County state’s attorney is charging four people, who are all alleged accomplices in the home invasion, with first degree murder: 19-year-old Brandy Marshall, 20-year-old Paige Marshall, 20-year-old Sarah Risner and 23-year-old Tyler Gulli. The are being held responsible for their friend’s death, prosecutors said.

The sheriff’s office says the homeowner has a valid conceal carry permit.

Bond was set at $2 million for all of them.

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Prosecutors say Gulli did not appear in court because he’s still recuperating from a gunshot wound.