(WSB Radio)  There's justice for a Clayton County boy and girl, scarred for life by their father, who poisoned their soup.

William Cunningham added all sorts of things to his kids' soup in an effort to extort money from the Campbell's company.

A jury has convicted Cunningham and sentenced him to 100 years in prison. 

Authorities say the first time he had forced them to eat soup laced with hot peppers and lighter fluid and the second time he used the prescription drugs Prozac and Amitriptyline,  both used to treat depression. 

Family members say Cunningham tried poisoning the kids three times, the third time forcing the soup down their throats.

According to federal prosecutors, Cunningham called Campbell's and threatened to sue. Authorities say there was no evidence the soup was tainted when it was purchased.

"Who would think your husband and the father of your kids would do that?" Rhonda Cunningham says.  She divorced William Cunningham after the poisoning scheme became known.

Janet Dockery is the children's grandmother.  Miranda and Billy Cunningham are 4 and 6, respectively.

"He said, 'Mawmaw, I think that's my old daddy,'" Dockery says.  "I said, no that's not your old daddy.  I played it off to be something else.  And he said, 'Yeah.  That's soup daddy.'  That's what he calls him.  soup daddy."

William Cunningham was earlier convicted in federal court of trying to extort money from Campbell's. 

Cunningham's former mother-in-law has no sympathy for him.

"I hope you get what you deserve while you're in there," Dockery says.  "They should feed him lighter fluid every night."