James Mumper Jr. was sentenced in Chula Vista court Friday for the fatal stabbing of 17-year-old Mateo Alexander Castillo at a house party in November 2022.
CVPD press release: U.S. Marshals San Diego Regional Fugitive Task Force arrested James Mumper Jr., 18, in connection with the murder of 17-year-old Mateo Castillo.
A teenager was stabbed to death during a fight Saturday morning at a house party in Chula Vista. Another teenager was stabbed and a third was left with serious.