ALLENTOWN, Pa. (AP) -- Investigators say a Pennsylvania man charged with strangling a woman and burning her body claims he killed her because he thought she was reneging on a promise to take him to a court hearing. Twenty-four-year-old Anthony Darrell Heath of Allentown is charged with homicide, abuse of a corpse and related counts in the death of 35-year-old Angela Steigerwalt of Tamaqua. Steigerwalt's body was found Feb. 1 in Jim Thorpe by firefighters putting out a roadside brush fire. A Pennsylvania State Police trooper testified Tuesday in Lehigh County Court that Heath said he was having an affair with Steigerwalt. The trooper said Heath admitted killing Steigerwalt when he suspected she was backing out of a promise to drive him to a child custody hearing and be there for emotional support.