More than six years after a car crash killed five people in South Florida, the case could become a test for how courts apply a controversial standard for expert-witness testimony.

Attorney General Ashley Moody’s office is asking the Florida Supreme Court to take up the issue, after the Fourth District Court of Appeal in July ordered a new trial for Jabari Kemp, who had been convicted of five counts of vehicular manslaughter and sentenced to 30 years in prison because of the 2013 crash.