It happened in broad daylight with dozens of witnesses around.
It was in the middle of the day on May 4 at the WalMart near 95th Avenue and Glendale.
The store was busy, and customers were all around, that didn't stop one suspect from getting what he wanted.
"He's pretty confident that he is going to get what he wanted, otherwise he was going to use that knife, that does put a little more fear into us as we are trying to hunt this guy down," said Sgt. Derek Elmore.
Cameras on both the outside and inside of the store captured the armed suspect walking into the WalMart's McDonalds store and walking out with more than lunch.
"He walks up to that employee and says I'm going to take all the money," said Elmore.
Elmore says the employee was about to head to the bank, also located in WalMart to make the deposit when the criminal struck.
"He then shows the employee the knife that he has, and is able to obtain the money from that employee and walk out of the WalMart to a car that is waiting for him out front," he said.
The suspect left in a 4-door silver colored sedan.
"Whether he scoped it out in the two minutes he was in the McDonalds when he walked in and went hey, crime of opportunity, I see them collecting all that money, I'm going to follow that employee out, or whether he had premeditated this kind of thing, we don't know, that's what we need to find out," said Elmore.
Silent Witness is offering a reward of up to $1,000 for information leading to an arrest. The suspected robber is described as a Hispanic male, in his mid 20's, about 5'6" with a skinny build. He has a small tattoo above his right eyebrow.
"It does put you on edge a little bit, knowing that this person is willing to use that knife, and will use that knife in a busy WalMart in the middle of the day with people around, without the fear of being detected," he said.
Police consider the man armed and dangerous, they want to get him off the streets before he strikes again.
If you have any information on this case, you're asked to call Silent Witness at 480-WITNESS.