This comes after the 24-year-old passenger of the car came forward on Sunday night and was charged with murder.
Senior Constable David Masters was deploying road spikes to try and stop the driver of a stolen Hyundai Kona, when the driver of the car struck and killed him.
The 33-year-old has been charged with murder, arson and unlawful use of a motor vehicle.
Wallis was represented by a lawyer at the Caboolture Magistrates Court and is set to appear in court on August 12.
Police are investigating whether there is a link between the two women and to a shooting that occurred on Saturday at one of the addresses that was attended to by police during their three-day search.
Join Tom Tilley with regular rotating co-hosts Jan Fran, Annika Smethurst and Jamila Rizvi on The Briefing, Monday - Saturday, for the day's headlines and breaking news as well as hot topics and interviews. Available on Listnr.