screw gauge chart Riddles

There are five houses in a row. Each house is painted a different color and has a person of a different nationality living in it. Each person drinks a different beverage, smokes a different type of cigar, and owns a different animal as a pet. Using these 15 clues, which person owns the pet fish? The Brit lives in the red house. The Swede has a pet dog. The Dane drinks tea. The green house is directly to the left of the white house. The person in the green house drinks coffee. The person who smokes Pall Mall has a pet bird. The person in the yellow house smokes Dunhill cigars. The person in the center house drinks milk. The Norwegian lives in the first house. The person who smokes Blends lives next to the person with the pet cat. The person with the pet horse lives next to the one who smokes Dunhill. The person who smokes BlueMaster drinks beer. The German smokes Prince. The Norwegian lives next to the blue house. The person who smokes Blends has a neighbor who drinks water.

One evening there was a murder in a house where there lived a married couple with their 2 children - their son and daughter. One of these four people murdered one of the others. One of the members of the family witnessed the crime. The other one helped the murderer. These are the things we know for sure: 1. The witness and the one who helped the murderer were not of the same gender. 2. The oldest person and the witness were not of the same gender. 3. The youngest person and the victim were not of the same gender. 4. The one who helped the murderer was older than the victim. 5. The father was the oldest member of the family. 6. The murderer was not the youngest member of the family. Who was the murderer?