Chillingworth was trying to make it seem like he was actually trying to help Dimmesdale by giving him medicine, which many people believed. But he wanted to kill Dimmesdale. “While thus suffering under bodily disease...trouble of the soul.” But this was all part of Chillingworth’s plan to get his revenge on Dimmesdale.
The last reason to show that Chillingworth is in fact guilty. He wants Dimmesdale to pay for what he did to Hester. He wanted Dimmesdale to get revenge and make him pay for his sin against their society, with the church. Now Chillingworth only wanted to torture Dimmesdale, not to actually kill him. But with all the suffering that he had went to through, was one of the reasons why he had died. Some would say that Chillingworth did not kill Dimmesdale, but you have to read between the lines. If all the pieces are put together then it shows that Chillingworth is definitely guilty of Dimmesdale’s