Home Invasion in Mission Valley

Around 11:30 last night a man returned to his Marigold Drive home to find a strange man in his house.  His wife and child were asleep inside.  The homeowner was able to get his family members outside while the intruder escaped to the bathroom.  Numerous officers responded code 3, but the burglary had exited the house prior to their arrival.  He was described as a male in his 20s wearing a dark blue mask.  Officers searched the area for over an hour but were unable to locate the suspect.  A CSI was working the crime scene.  Unknown if anything was taken from the house or how the suspect entered.