Sims said Fordham called 911 for help. In a recording played to the jury, a dispatcher is heard asking Fordham if he had washed Sims and put her in the shower. He had not.
Sims, who was blinded by the acid, couldn't understand why he wasn't rinsing her off.
"He said, 'If I rinse you off. It's going to ignite the chemicals,' and I'm like, 'What are you talking about? I'm burning. I'm on fire,'" said Sims.
A paramedic later testified the acid had burned through Sims clothes and that he was surprised that Fordham had not rinsed her off. He also said he was suspicious of the wide spill area of the acid into the hallway and walls.
Fordham showed no outward emotion as the judge read guilty on all three counts of battery and assault.
Sims and her mother embraced and shed tears.
Channel 2's Tom Regan asked Sims if the verdict was justice.
"It is. I'm not going to rejoice that this man is going to jail, cause nobody has won," she said. "I'm like this for the rest of my life, and he's about to lose his freedom. Nobody wins here."
Sims has undergone over a dozen skin graft surgeries. She told Regan that Fordham did it because he knew she wanted to break up. He claimed he slipped on water and accidentally threw the drain cleaner on her.
"In the process of all this legal stuff, I had had my face taken off and put back on every couple of months," Sims said. "You know what I'm saying? I should be able to rest."
"I'm just glad it's over," said Elaine Tucker, Sims' mother. "It's been such a long time. A long struggle."