A retired Simi Valley teacher was stabbed and beaten to death last week by a former boyfriend who died after having a heart attack and crashing his truck as he fled the scene, police announced Wednesday. Investigators believe that Paul Porter, 66, of Scottsdale, Ariz., killed Janice Somple on Thursday inside her home in the 1500 block of Carmen Drive. They said Porter and his wrecked truck were found in the early afternoon about 1 1/2 miles away near Madera Road and Country Club Drive in Simi Valley. He later died in the hospital. Simi Valley police said Somple, 65, was not discovered until 8 p.m. Thursday when an acquaintance found her body and called 911. "We know Paul killed Janice and how he did it," Sgt. Randy Foushee said during a news conference. We are still seeking an answer as to why he returned to Janice's home after many years and murdered her. Somple retired in 2008 after 28 years with the Conejo Valley Unified School District, where she taught English courses at Westlake and Newbury Park high schools among other assignments.