Vital Statistics at Time of Disappearance
Details of Disappearance
Jack was last seen on September 13, 1999, in Upland, California. In November, 2004, Marcia Ann Johnson was convicted of Irwin's murder. She confessed to killing Irwin and dismembering his body with a chain saw and scattering the remains.
If you have any information concerning this case, please contact:
Upland Police Department