NEW ORLEANS—Four teenagers face murder charges in connection with a carjacking that left a 73-year-old woman dying on a New Orleans street, her arm severed after she was dragged a block by her own car while neighbors looked on helplessly, officials said Tuesday. Police chief Shaun Ferguson said tips led to the arrests of the teens—a 17-year-old boy, a 16-year-old girl and two 15-year-old girls—in the hours after the Monday afternoon carjacking. Two were turned in by their parents. All face second-degree murder charges, and Ferguson said he will recommend that they be charged as adults. “That’s a conversation that my team will have with the district attorney’s office,” Ferguson said at a Tuesday morning news conference. “I would say absolutely, I encourage, I will ask, that they be charged as adults. … I mean, look at the nature of the crime.” Ferguson confirmed that Linda Frickey died after she …