TULSA, Oklahoma - It's been nearly four months since a Tulsa cancer clinic was shut down by the federal government. Camelot Cancer Care was raided by Food and Drug Administration agents on April 23, 2013.

Since the raid, one employee pleaded guilty to misdemeanor interfering with federal agents, but other than that, no charges have been filed.

Maureen Long owns Camelot Cancer Care. She remains elusive as ever, but we've learned of some of her plans to launch a comeback.

The office that housed Camelot Cancer Care is now vacant. The sign has been removed from the door, the names of employees have been etched away, and nothing is parked in the reserved parking spots outside.

If you call the clinic's main number you get this message: "Hello, you have reached Camelot Cancer Care. We are currently not accepting new patients, but if you will complete the medical history forms from off our website, camelotcancercare.com, we will evaluate your case free of charge."

The message goes on to explain that, if a patient is eligible, Camelot will find a clinic that administers a similar formula.

Maureen Long says she's never received an order from the FDA telling her she can't operate a business. She says she'll keep fighting for cancer patients to get the treatment they choose. In fact, that message on Camelot's business line is similar to a plan she proposed in a letter in May.

It was dated May 8, and from Maureen Long herself. In the letter, she speaks of weathering an FDA attack and asks for a network of doctors to treat patients approved by a Camelot RN. The patients would then make a donation to the Camelot Legal Defense Fund. After that, the doctors would get a 20-day supply of medicine from Camelot.

Long says in the letter, $12,000 would be a modest figure to charge the patients for that 20-day treatment.

We spoke with Maureen Long over the phone. She said that plan was developed after alternative medicine doctors from all over the U.S. contacted her in late-April. She's no longer pursuing that idea but said she is considering different ways to stay open and treat patients.

"We were, at the time, weeks ago, but if I were going to do that, why would I tell you that, Mr. Bewley, and leave myself open to a lot of supposition and attack?" Long said.

Margaret Hilger is one of Camelot's former patients who lives in Wichita. She said she paid Long more than $16,000 for a treatment that didn't do anything and warns against anyone listening to Long's future plans.

"I would caution anybody. I would absolutely caution anybody, especially if she's asking for the money up front. This has devastated us, big time," Hilger said.

The FDA is not commenting on the case.

Late Tuesday afternoon, Maureen Long emailed News On 6 to say the intent of the plan in May was to treat patients who were left in the dark after the FDA raid.