Angela Yvette Grayson was found unconscious on the night of Jan. 21 with severe head trauma. Her 33-year-old boyfriend Adrian Iakapo, also of San Bernardino, admitted getting angry with her, knocking her to the ground and kicking her in the head until she lost consciousness, according to police.
Police also say he left her in that condition for several days until police arrived on a welfare check.
Grayson has been at Loma Linda University Medical Center until Saturday.
Iakapo is in custody on charges of assault with a deadly weapon and corporal injury, and the district attorney's office will review the case to decide whether to charge him with murder, police said.