The Rancho Feeding Corporation slaughterhouse is where CNN exposed issues surrounding one of the biggest meat recalls in years.
The congressional action authorizes one-million dollars in extra funding to "provide for a swift completion" of the department of agriculture's probe.
Federal investigators have said they believe the company bought diseased dairy cows and processed them when government inspectors weren't there.
After the cows were killed, employees would allegedly hide the warning signs of cancer by trimming off diseased parts.
They would allegedly use a fake stamp of approval or even replace the heads of sick cows with ones from healthy animals.
According to sources familiar with the probe, that all contributed to the February recall of nearly nine million pounds of meat -- as well as a criminal investigation.