Meera Khan’s nine years as a Miami caseworker for the state Department of Children & Families should have raised red flags, authorities say.

She boasted more cases than her coworkers. Many of the unrelated welfare applicants under her watch used the same addresses. And many of the people she approved for state benefits, were previously denied by other workers.

After a two-year long investigation, state investigators say they’ve figured out why: They say Khan created and authorized food stamp and cash assistance applications for people who were not eligible, or only partially eligible. She then ripped off those benefits, getting kickbacks from businesses that cash the food stamps, authorities said.

In all, the Miami-Dade state attorney’s office said Khan stole more than $1.3 million in welfare assistance, largely by cashing in on the fraudulently obtained food stamps.

She was arrested Thursday on a list of more than 80 charges, including 39 counts of official misconduct, one count of first-degree grand felony and 39 counts of public fraud.

The DCF said Khan, 51, resigned from her post June 1, 2009. The investigation was conducted by investigators from the Florida Department of Financial Services.

“We can never tolerate fraud and theft by anyone, particularly by trusted public employees upon whom our community depends,” Miami-Dade State Attorney Katherine Fernandez Rundle said in a statement. “Such thefts are the ultimate acts of betrayal.”

Khan also ripped money from Florida Medicaid benefit programs by collecting made-up “processing” and “renewal” fees from applicants, the affidavit said.

DCF officials declined to comment on an ongoing investigation, but said that the agency created a Public Benefits Integrity unit this year to target potential welfare fraud.