LUFKIN - Zavilla resident Walter Metcalf is blaming Heparin - for the death of his wife - Thelma.

The very drug that has recently made worldwide news.

"Her primary doctor said that she didn't know why (Thelma) went down so fast," said her husband of 48 years.

Before being treated, Walter said Thelma could drive to get around town.

But just six weeks after receiving treatment at the DaVita Dialysis Center of Lufkin - she quickly detoriated.

In fact, he said after her first treatment at DaVita, she passed out and he was the one that had to alert nurses that she was sick.

In March of 2008 - the FDA made major nationwide recalls of certain types of Heparin - imported from China.

And Metcalf wants to know - did the news ever get to the DaVita Lufkin Dialysis Center that the medicine may have been tainted?

"They had some contaminated Heparin that was still out on the market," he said. "They quit shipping it out but they didn't recall all that had been shipped out."

Or did a person at the DaVita Center knowingly committ a crime -- like the company claims?

"We believe that the unusual amount of deaths, were related to a single individual committing a crime," said Devita Nephrologist Dr. David Van Wyck, from the national office.

A person they say - Davita already fired.

When his wife started going to dialysis treatment, Metcalf says people started to wonder why so many patients were getting sick after leaving Davita.

"The doctors at the hospital said this is happening everyday over there at DaVita," said Metcalf. "The doctors felt something had to be done about it. They've got another dialysis center here (in Lufkin) and it wasn't happening there. Why was it happening at Davita?"

On Monday, the The Lufkin Daily News said an expansion survey conducted by the Texas Department of Health and Human Services on July 18, 2007, indicated the DaVita clinic at 700 S. John Redditt Drive had not adequately staffed its facility and had not given patients the correct prescribed treatments as ordered by a physician.

The report was one of several documents released by the state in response to an open records request from The Lufkin Daily News .

"A review of the list of patients found 22 (out of 22) patients were being dialyzed with the incorrect dialysate," the report stated.

Police started their own probe of Davita - two weeks ago - after a spike a deaths at the facility prompted its doors to close.

"It's been an extensive investigation with a large number of people being interviewed," Lt. David Young, lead investigator of the case, said Thursday.

Just last week, the state concluded their own investigation and that report is expected to be issued soon.

Walter says Thelma's doctor - cited a Heparin overdoes - after she got sick.

But he wonders - is perhaps the company itself to blame?

"They were definitely understaffed," he said. "All you have to do is walk in there and look."

Metcalf says he misses his wife of 48 years and feels like her life was cut way too short.

Nothing can replace her, but he says for now, he and his four children want closure.

And justice.

"I don't know anything about medicine," Walter said. "You gotta believe what that doctor tells you and you have to trust him. And obviously...they let me down."