alexandra luggett drove around the wrong way sign and got on the ramp, where an officer stopped her. it was 3:00 in the morning and authorities say she failed sobriety tests and failed >>> we are learning a mistake anyone could make. >> reporter: roommates living in this home left their front door unlocked and woke up with guns pointed in their faces. we also learned the name of the man who was shot, grant langenberg, an army veteran. he did at least one tour of duty in iraq. his roommates believe he tried to fight the intruders and was subsequently shot in the chest. they have no idea why someone would have targeted this home. >> i'm worried about them coming back. i'm kind of scared to stay here a couple nights. you know, i don't know why they came here. i don't know. >> reporter: it's not clear how many intruders there were. one witness says they believe there were three people who came inside. the sheriff's office also says they believe that the man who was shot may have known the people who came inside the home. his condition right now is listed as critical but one thing we are