The puzzle-solving process of the game "Fatal Testament" mainly relies on players to investigate clues in the game and complete the case by synthesizing evidence after obtaining evidence. There are many scenes in the game, and there is a lot of evidence in different scenes that players need to collect.

Chessboard moves content:
The chess pieces are arranged as shown in the picture. Two soldiers are in front, the queen is behind, and the other two are on the side of the queen.
Of course, you can also squeeze in through the wall to the left of the chess piece to see the clues (bugs) in the room.

Select answer content:
Dark Childhood: A Maid's Diary - a group photo - a transaction sheet.
What I remember about the fake scene is the drugs, the alarm clock that was not turned off, and the contradictory habits.
This plus, enclosed doors and windows.

How to make this perfume?
Blue, green, blue, orange, no orange, no, it’s not that blue counts first, but counts three after blue.
Blue, green, blue, orange, white, orange and white, it should be
My guess about the course of the case
Catherine wanted revenge, so she contacted Jay in a nightclub and pretended to be in love. She secretly used her status as president to trick him into owing a huge debt to the nightclub (the date of the IOU was not clearly visible), and encouraged him to use his inheritance to make up for the shortfall. The two of them lived happily ever after with the remaining money. Conspiring to kill Owen.
The two of them bought chronic poison on 10.3, and on 10.8 Jay wrote a symbolic contract of 1 dollar and hired her as a maid in the house to facilitate her daily poisoning.
The two of them originally planned to spend three months slowly poisoning Irving to death (as can be seen from the employment contract). Unexpectedly, some days later, Jaylen learned from the lawyer's chat records that those who are not related by blood cannot get the inheritance. Moreover, Irving's assets have changed recently.
I am a little confused here, because in fact, formally adopted children can share the inheritance (of course, if all the money is donated before death, there will be no inheritance, and no one can get the money).
So I have a conspiracy theory that this lawyer was hired by Catherine to prevent others from finding out about the relationship between her and Jaylen who were both in the orphanage run by Owen when they were children, or to increase Jaylen's determination to kill. (Or maybe the law here simply means that you can’t share money if you’re not related by blood?)
Afterwards, the two found out that Owen planned to donate all the money to the orphanage on December 4, so they had to take action on December 3. I think it was Jaylen who took a hammer and knocked Owen out in the study while he was off guard (because the wound was on the front, and if there was a conspiracy, it would have been a man).
Catherine melted the hammer, burned Owen and Jalen's bloody clothing, and cleaned up the scene. Jaylen dragged Irving to the bedroom and bathroom, took a towel and soaked it with water outside to freeze it (the footprints could be said to be walking a dog). He pretended that Irving had just come out of the shower, went to his study to get a vase, put it on the frozen towel, and arranged it. What a secret room, after a while the towel melted and the vase smashed Owen to death.
If the case is not found out and he is found to have committed suicide, Jaylen will get the inheritance. But the money Jay owed to the nightclub might have gone into Catherine's pocket. In the end, Catherine took Jay's money and ran away.
The plumber felt that Catherine and Jaylen deliberately invited an outsider that day in order to divert suspicion, but they just happened to meet another Avenger pretending to be the one.
According to common sense, poisonous incense should be poisonous in the middle of the night, which is more concealed, so Owen should have been killed by the vase before he was poisoned. The cat died because it was light and required a small dose to produce the poison. So the plumber should have committed attempted murder.
ps: Why was it knocked unconscious in the study and not killed? Because I feel that it takes a long time to clean the scene and arrange the secret room. If it was smashed to death in the study, the corpse in the secret room would not look like a fresh one when the police came. It would look like it was knocked unconscious. The prisoner has a higher IQ. Of course, maybe the autopsy here was not that clever and couldn't tell, or maybe Jaylen was killed by a slip of his hand. After all, this speed is still quite difficult to control.
pps: There are so many tools on the wall in the garage, and the plumber can borrow one, but I can only get the screwdriver by opening the fish lock drawer. This logic is really stupid.