A argument between boyfriend and girlfriend ended with the man in critical condition from a stab wound to the chest.
Police say the man was taken to SAMMC after his girlfriend stabbed him at a home in the 4300 block of Bikini.
Officers arrived at the house and found the 20 year-old man bleeding from the chest wound.
They say they found his 20 year-old girlfriend a block away and took her into custody.
No word on what charges she might face.