The Kenosha County Sheriff’s Office is investigating a home invasion which left an elderly couple injured early Friday morning.  Witnesses say a man broke into the home and beat an 84-year-old man and his 83-year-old wife.  Their names haven’t been released.  Deputies say the man was awakened by the sound of breaking glass and he confronted the intruder when he went to check things out.  He had to be flown to Froedtert Hospital for treatment to his serious head injuries.  No details were offered about how serious the wife’s injuries were.  Kenosha County Sheriff David Beth thinks the unusual crime in a quiet neighborhood in Somers will be traced back to the drug epidemic.