Detective case 1

                                                         I Love You Dad

You are a famous detective named John Kei. You must solve the murder of a famous company owner. there are 4 suspects are:  
1. Chris Bernard (First Son)
2. Sam Jackson (Second son, he and Robby are twins)
3. Robby Jackson (Second Third)
4. Jack Smith ( His Brother)
 
Found some clue:  
1. A bloodied kitchen knife victim
2. A paper containing the number held by the victim. ie: 10 1 3 11 19 13 9 20 8
3. Found a book code belonging to the victim
4. The victim had met with the three suspects (except Chris) in the yard, living room, and kitchen. 
5. Victim's wife heard the sound of the room one of their children, he heard "I really do not like daddy! Him always comparing me to my brother, as if I shadow of him. Dad think if he's much better than me. Felt I did not want to be born in this world! oh ... I know! I could kill him. "
6. alleged victim's brother really wants his the inheritance from his brother.