[4] Simpson's inspiration for the legislation came from a first-hand experience as a Kent firefighter when he was dispatched to the scene of a hit-and-run that resulted in the death of Carol Thueringer.
[5] Simpson also sponsored HB 2713 which expanded the state database of DNA samples from criminals primarily convicted of sex-related offenses.
In the wake of reports of price gouging by various merchants around the state of Washington after the September 11, 2001 attack on America, Simpson introduced legislation to protect consumers from the practice.
[7] On January 19, 2004, Simpson introduced HB 2660 which was signed into law and required a DUI offender to install an ignition interlock device as a condition of restoration of their driving rights.
[13] Simpson also sponsored HB 2739 in the 2010 session,[14] the House companion of a new law to increase the safety of children in school crosswalk zones by allowing crossing guards to report vehicles driving dangerously to police who can issue double fines after investigation.
[20] On April 27, 2008, Simpson was arrested and charged in King County District Court with fourth-degree assault and interfering with a domestic violence report after an alleged altercation with his ex-wife.
According to news sources, "A social worker told police she saw Simpson "barrel" into the room, push the former wife and shut the door.