Prosecutors are wrapping up their case against the owner of a Georgia peanut plant linked to a deadly salmonella outbreak, saying he knowingly approved shipments of tainted food “whatever the risk.”

Jurors began hearing closing arguments Thursday in the five-week federal trial of former Peanut Corporation of America owner Stewart Parnell and two others charged with covering up lab tests that found salmonella in peanuts and peanut butter. The company’s products are blamed for killing nine Americans and making 714 others sick in 2008 and 2009.

Defense attorneys took barely an hour Wednesday to rest their cases after more than a month of prosecution testimony.