Ed Graf's retrial for murdering 2 stepsons in shed fire based on new arson science
                                
                                
                                    (Newser) -
                                    In 1988, Ed Graf was convicted and sentenced to life in prison for killing his stepsons Joby, 9, and Jason, 8, in 1986 by locking them in a shed, dousing it with gasoline, and setting it on fire. Everything was there to prove the case against the Texas man, per...