Investigators say Kourosh Keshmiri was driving 50 mph in a 25-mph residential area when he lost control of his red Cadillac Sunday at about 3 a.m.
The car slammed into a house in the 26000 block of Pacato Drive and into the front bedroom where 60-year-old Kenneth Jackson was sleeping. Jackson was declared dead at the scene.
When deputies arrived, prosecutors say Keshmiri displayed signs of intoxication and "performed poorly on a field sobriety test."
Keshmiri was already facing a misdemeanor count of driving under the influence of alcohol from a June incident, and his driver's license had been suspended. In addition, he already had a misdemeanor DUI conviction in August 2010.
Prosecutors say Keshmiri had been advised after his 2010 conviction that "he could be charged with murder if he killed another person while driving under the influence of alcohol or drugs."
If convicted, Keshmiri faces 15 years to life in state prison. He is expected to be arraigned in a Santa Ana courtroom on Tuesday.