Kimberly Jane Thompkins, Robert Crosby and Daryith Lorraine Stevens met at a Pittsburgh-area fast-food restaurant on Monday and plotted to kill Adam Thompkins, authorities said. Kimberly Thompkins and Stevens are from Jacobs Creek, while Crosby is from West Newton.
On Tuesday, Kimberly Thompkins drove her husband to Cedar Creek Park, 25 miles south of Pittsburgh, authorities said.
Shortly before noon, Crosby stabbed Adam Thompkins with a knife, police said. Kimberly Thompkins took a change of clothes and pliers to pull her husband's teeth, and there was a can of gas to burn a body, according to an affidavit of probable cause.
A bystander saw a bloody man in the park and called police, who investigated and found Adam Thompkins covered in blood. Police said they later made the arrests after the suspects gave conflicting stories.
Adam Thompkins was flown to an area hospital. Local media reported that he has been released.
Kimberly Thompkins, Crosby and Stevens face charges of attempted homicide, conspiracy and other crimes. They're being held in the Westmoreland County jail, unable to post $100,000 bond each and unavailable for comment. No defense attorneys were listed on court papers.
Police haven't said what the motive for the assault was, but Westmoreland County District Attorney John Peck told TV station WTAE that Crosby had been living with Kimberly Thompkins.
Park police declined to comment on Thursday.