The information about the weapons and ammunition removed from David Ludwig's home was contained in report on a search warrant that was executed Sunday by Warwick Township police, while he and his 14-year-old girlfriend were still at large.
David Ludwig is being held without bail on murder and kidnapping charges after being flown back to Lancaster County on Tuesday from Indiana, where police captured him following a chase.
Police allege Ludwig shot Michael and Cathryn Borden at their home in Lititz following an argument early Sunday over his relationship with their daughter Kara. The two had been dating, apparently secretly, friends and witnesses said.
Kara Borden also was flown back to Pennsylvania from Indiana on Tuesday and police say they are treating her as a crime victim but that the investigation is continuing. She has been reunited with her family.
"She is very young and I am sure she was manipulated," said family friend Debbie Zelek at a memorial service for the Borden parents Wednesday evening. "She was only a child. She doesn't know what's going on."
About 100 people attended a prayer service Wednesday night at Monterey Chapel in Leola, where Michael Borden was a church elder who taught Sunday school.
"It was very poignant," Kellymarie Conlon, a friend of Kara's older brother James, told CBS News Early Show co-anchor René Syler.
Gregory and Jane Ludwig, David's parents issued a statement Wednesday night, saying that no words can express "sorrow, shock and senselessness" of the shootings.
Friends of the family have established a trust fund for the younger Borden children.
"We want to provide for the health, welfare and education of all the children, especially Caitlin, Kara and David, as they are the minor children. They will need the most assistance at this time," family friend Zach Acox said on The Early Show Thursday. "We want to take care of immediate expenses, continuing expenses and college education — the things that Mike and Cathy Borden would have otherwise been able to take care of themselves."