Just after 6:30 a.m. on I-65 north, a car driven by 32-year-old Siang Hnin, of Indianapolis, was following a semitrailer. Police said when the semi slowed down, Hnin was unable to slow and changed lanes to avoid hitting the rear of the semi. However, he struck an Indiana State Police trooper’s Charger that was marking a semi from an earlier crash. ISP said the trooper had his emergency lights on and was slowing traffic in the left lane to assist with crash removal.