Two brothers visiting their father in San Marcos got into a fight over too much noise in the house. 56-year old Michael Young became angry with his 51-year old brother Robb early Wednesday morning in the 1700 block of Victoria Way. The argument escalated and led to a fist fight in the front yard. The older brother went back in the house and left his younger brother on the ground. 40 minutes later Young checked on his brother and he wasn't breathing. Young flagged down a passing motorist who called 911. Robb Young died at the hospital from blunt force trauma to his head. Michael Young was arrested on suspicion of voluntary manslaughter.