A woman in Des Moines, Iowa, spotted an assault rifle on the roof of a police officer's squad car on Sunday afternoon.

"I thought maybe it was a bike rack at first or something, but I kind of seen it hanging over the edge and I was like no, I was like is that, I think that's like an assault rifle just sitting on top of their vehicle," Jones said.

Jones made a traffic stop of her own, waving down the officer at a red light.

"I approached him with caution and just told him and he was completely stunned," she said. "I could just tell on his face like he was a little confused and I keep telling him like, and I'm like pointing like, 'There's something up there that you might want to get,'" Jones said.

Des Moines Police Chief Michael McTaggart said in a statement posted to social media it wa

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