Aswegan tells PEOPLE that officers were first called to Macke's home on September 21 after receiving a report from the father of two of Macke's children that she had left the day before for a 12-day vacation in Germany. Upon arriving, officers found four children - two 12-year-olds, a 7-year-old and a 6-year-old - alone. She didn't plan on returning until October 1, but police contacted her and told her she needed to return to the US immediately.
Macke made no arrangements for supervision of the children while she was away, according to police.
Johnston police have charged Erin Macke, 30, with four tallies of youngster danger and one of exchanging a gun to a man under 21.
As for her children, the twins are staying with extended family members while the other two are with their father.More news: Bali evacuees wait for signs of Mount Agung volcano eruption
A message left for her was not immediately returned on Friday. "One of the 12-year-olds showed us where the weapon was at".
"I've never heard of anything like this before", Tompkins said.
Police tracked her down in Germany and she was taken into custody when she arrived back in Iowa.More news: Federation Internationale de Football Association set to call ceasefire with poppy pushers
Her next scheduled court date is October 9 in Polk County.
It's like a real-life version of the movie "Home Alone", except in this case, the children were purposely left behind.
Macke is being held in the Polk County Jail in lieu of a $9,000 bond and was also hit with a "no contact" order, which means she can not see her children.More news: Kim Jong Un: 'Deranged' Trump will 'pay dearly'