HARRIS COUNTY, Texas (KTRK) -- An 18-year-old has been charged with murder in a shooting that investigators initially said was an accident, court documents show.

PREVIOUS REPORT: 19-year-old shot by 18-year-old friend; shooting being investigated as accidental: HCSO Early Wednesday morning in the Atascocita area, a 19-year-old was hospitalized with a gunshot wound to the head, the Harris County Sheriff's Office said.

Investigators said the 18-year-old shot the 19-year-old in the head in an upstairs room of a home on Spring Brook Pass.