LAKE COUNTY â An increase in carjackings across the state line has prompted Northwest Indiana police agencies to be on high alert. As recently as Jan. 23, a group of people stole a car from Star Liquors in Hammond, and hours later drove to a Marathon gas station in Lansing, where they attempted to carjack someone else, police said. The attempted carjacking in Lansing led to a shootout that killed 15-year-old Troy Pearson, of Harvey, and wounded two others. Pearson was among the group who attempted the carjacking, Lansing police Lt. Al Phillips said. Pearson and others tried to escape in the car they had stolen in Hammond and ended up crashing, police said. Four minors who ran to a Walmart near the gas station were arrested.