Lakeland police responded to a deadly crash early Sunday morning. The crash happened around 2:30 a.m. Sunday near the Interstate 4 access ramp and Memorial Boulevard. According to the Lakeland Police Department, a Ford Expedition was headed west on Memorial Boulevard before the crash. Police say the vehicle left the roadway, causing it to cross a grass median and move into eastbound lanes. The SUV then struck a concrete median and rolled over several times after the driver, Jeison Gutierrez, 20, of Plant City tried to negotiate a curve.Gutierrez, who police say wasn't wearing a seatbelt, was ejected from the SUV. Life-saving measures were performed on Gutierrez at the scene. He was later pronounced dead. A 31-year-old passenger had serious injuries that weren't life-threatening. According to Lakeland police, speed was a factor in the crash. The Traffic Homicide Unit is leading the investigation.Police also say toxicology tests will be conducted.