Authorities are looking for a man and woman who scammed numerous elderly victims over the course of a year.
The suspects stole jewelry, cash and credit cards from elderly residents of the Fellowship Square Senior Community at 6945 E. Main Street in Mesa.
There are approximately 27 cases of theft, and no evidence of forced entry.
Investigators believe that a current or past employee may have used a key to gain access to the separate residences.
The property and cash lost is valued at $50,000.
"This is the lowest of the low, to prey upon not just the elderly but vulnerable elderly with Alzheimer's. And if they are a prior employee or present employee, they're very fully aware of the mental capacity of those residents," said Phoenix Police Sgt. Darren Burch.
In one case, a credit card was fraudulently used by the suspects at a Walmart store in Gilbert. Surveillance video was obtained, but the people in the video don't match any of the workers at Fellowship.
"They may not be related to the actual residential burglaries in a sense that they don't match any of the employees or past employees, but they may be one degree separated from those individuals and got the card from them," said Burch.
The community has since made a number of upgrades to its security.
Anyone with information is asked to call police. A reward of up to $1,000 is being offered.