SEDALIA, Mo. -- A woman was arrested after police said she dialed a wrong number and told a police detective that she wanted to buy drugs.

Detective Phil Stewart said he was sleeping last Thursday morning when he got a call on his cell phone from Tammy Banks, 41, of Sedalia.

The call was a wrong number, but Stewart was suspicious, so he said her friend wasn't around and then asked the caller what she needed.

"That's when she told me she wanted half a gram of meth," Stewart told KMBC's Marcus Moore.

Stewart, who has been a drug enforcement officer for six years and has executed about 250 warrants, agreed to help.

"I just said, 'Sure, I can do that for you,'" Stewart said.

Moore reported that Stewart's partner, Detective Cameron Egan, met the caller at a neighborhood park.

"Still driving over there, I was thinking, 'There's no way this is going to happen. It's too funny," Egan said.

Egan said he took $40 from Banks and gave her a fake bag of meth.

"She was relaxed, smiling," Egan said.

Banks was quickly arrested.

"I wish they were all that easy -- it would make our job a lot easier, that's for sure," Egan said.

Banks was charged with attempt to posses a controlled substance. She is being held on a $5,000 bond.