The U.S. House of Representatives on Wednesday threw its weight and pocketbook behind the federal investigation of a California slaughterhouse where CNN exposed issues surrounding one of the biggest meat recalls in years.

The latest congressional action authorizes $1 million in additional funding to "provide for a swift completion" of the U.S. Department of Agriculture's probe into the Rancho Feeding Corporation.

Federal investigators have said they believe the Petaluma, California-based company bought diseased dairy cows and processed them when government inspectors weren't there. After the cows were killed, employees would hide the warning signs of cancer by trimming off diseased parts, using a fake stamp of approval or even replacing the heads of sick cows with ones from healthy animals.

That all contributed to the February recall of nearly 9 million pounds of meat as well as a criminal investigation, according to sources familiar with the probe. A federal law enforcement source has told CNN that charges against Rancho's former owners - the plant has since been sold - have been decided. But that decision has yet to become public.

And in the plant where it all went down, a government inspector and a Rancho foreman were involved in an inappropriate romance, according to documents obtained by CNN. A USDA spokesman said last month that the department "is conducting a thorough investigation into personnel issues related to this case."

Read - After CNN exclusive, House OKs more funding for massive meat recall probe

Previously:
When a slaughterhouse recalled nearly 9 million pounds of meat, this rancher got caught in the crossfire
What is 'adulterated' meat?
Who is looking out for your food safety?
Food poisoning: What you need to know

Consumer resources:
Unfit for Human Consumption: How nearly 9 million pounds of bad meat escaped into the food supply
Centers for Disease Control and Prevention
Food and Drug Administration's Recalls, Market Withdrawals, & Safety Alerts
FDA Food Safety
FoodSafety.gov