A 16-year-old has been charged with murder after confessing to stabbing a man to death in Langley Park on Jan. 8, Prince George's County police said. Oscar Eduardo Rosales-Madrid of Hyattsville admitted to killing 30-year-old Alejandro Marcos Diaz Vasquez on University Boulevard, said deputy police chief Gary Cunningham. He has been charged as an adult with first- and second-degree murder, he said.

"It's still not clear what the motive is in this case," Cunningham said.

The county has seen 15 homicides this year, including one in which a homeowner killed an intruder and has not been charged.