Without waiting for a few people to ask, he took the first step and said, "The background app program of the Apple mobile phone will not disappear because of the record after shutting down, Zhou Yang has no habit of closing the background app, even though these apps may not occupy traffic." But as long as you don't turn it off artificially, it will always exist.

Yesterday, I got some inspiration from Xiao Guo's words, will Zhou Yang be hypnotized? Just now we confirmed his alarm ringtone, and I thought about it for a while, it's unlikely. Because Zhou Yang has not received any phone calls or WeChat messages since the morning of the accident until the car overturned into the river, the only thing I can think of to set up ambush reminders at regular intervals is the alarm clock. Just confirmed, there are no issues with the alarm clock either. But at the time, I actually thought of a possibility, what if the sound was played through a mobile phone? ”

Liu Zheng said: "You mean the built-in music software of the mobile phone, which connects to the media in the car through Bluetooth and plays music? ”

Feng Yan nodded, "Yes, so I just checked Zhou Yang's mobile phone, Apple X's background program is viewed by scanning from the bottom up, if you want to close a background program, just scan the subpage of this program up again." The order of the program depends on the order of use by the owner of the mobile phone, that is to say, if Zhou Yang's background program shows that the music app is the first, then it is almost certain that the last app Zhou Yang used before his death may be this music app, which is connected to the car stereo through the music app Bluetooth and plays music.

Just now when I was checking Zhou Yang's mobile phone, I found that the order of the background program is like this: the first is the phone record, and the second is the handsome cat music. Because considering that some staff members might look at Zhou Yang's mobile phone after his death, I confirmed it with Wu Yu. It can be affirmed through the video,The 123rd background program,Wu Yu checked later,You now look at the order of the background program of the mobile phone,The first should be the setting、The second is the alarm clock,Then the 3rd,4、5 is the phone record、The bar is the handsome cat music,The setting is the last thing we checked,So the top to the first。 ”

After a few people checked, Feng Yan took the phone and said, "Now we can enter Shuai Mao Music first, check the last song Zhou Yang listened to, and see if there is anything weird." ”

Even after the music software is completely exited, it can record which song was the last song to listen to, and when Feng Yan opened the software, he found that the last song Zhou Yang listened to before his death was a song called evey stay. This song is stored in a playlist, along with 12 songs, all in English, and the name of this playlist is Music Therapy.

"Ha~Ha~"

Feng Yan laughed stiffly, Liu Zheng immediately took out Zhou Yang's medical record at that time from the bag he carried, he remembered very clearly, there was a song catalog of music therapy in that medical record at that time, which was the song recommended to him by Zhou Yang Psychological Hospital, and he could relieve his violent tendencies by listening to these music, and it was very clear in the medical record at that time that the time to listen to these songs should be between 8 o'clock ~ 10 o'clock in the morning, so the effect is the best.

"The psychiatrist provided a total of 11 songs, and there was no song called Evey Stay."

Feng Yan hugged his arms and said, "In other words, someone added a song to the song list that Zhou Yang created for his own treatment. Let's listen to this song first. ”

Evey Stay began to play, this is a tune of unusually soothing pure music, very comfortable to listen to, and it is quite calming, the harmony of multiple instruments, the type of tune feedback a strong hypnotic effect.

After listening to it for more than 1 minute, Feng Yan said affirmatively, "I already know all the whole process of how the murderer killed Zhou Yang. ”

First of all, the murderer secretly added this song called evey stay to Zhou Yang's treatment playlist, note that this song called evey stay is in the 8th place on the playlist. The recommended time for listening to songs is 8 o'clock ~ 10 o'clock, Zhou Yang went out at 8:10 o'clock, the road conditions in the urban area will not be too good, he may not have much time to listen to music, so if he is on the highway and then turn on the mobile phone to connect to Bluetooth and start listening to music, the songs in this song list, each song time is more than 5 minutes. Zhou Yang is on the highway at 8:50, on the bridge at 9:25, the time during this period is 35 minutes, 7 songs have been played, and the length of the entire bridge is 12 kilometers, according to the speed of 120 km / h, the time from the bridge to the bridge must also take 6 minutes, when the deceased went on the bridge, just started to play the 8th song of the playlist, that is, this evey stay that sounds a little listless to me. The murderer accurately calculated Zhou Yang's driving and listening habits, and the song was placed on the bridge where Zhou Yang had to pass and started playing, which made Zhou Yang feel tired, drowsy, and finally fell into the river. ”

After a pause, Feng Yan fell into deep thought, and after thinking for about a few seconds, he said, "Everyone must know the conclusion, only people who are very close to Zhou Yang can understand Zhou Yang's living habits so well, and secretly add this song to the song list, this person is undoubtedly Cheng Fei." But we have already analyzed before that Cheng Fei is not the real murderer, at best he is an accomplice who covers after the fact. She subjectively never wanted Zhou Yang to die, so the step of secretly changing the song should not have been done by Cheng Fei, so ...... Who will it be? ”

After listening to Feng Yan's analysis, Wu Yu was in a much brighter mood, he said, "Don't worry, Feng Yan, the investigation has reached this point, let's check the origin of this song first, and then bring Cheng Fei to the bureau for detention and interrogation, there will definitely be eyebrows, even if this song is not put by her, as a cover for the real murderer, she must also know who the real murderer is." There was not much evidence before when she didn't dare to interrogate strictly, but now that the evidence is almost there, she will definitely be able to break through her psychological defense line by bringing these analysis results to the table. ”

In the evening, the police were interrogating Cheng Fei all afternoon, and what was surprising was that as soon as the police put the evidence out, Cheng Fei immediately admitted that she did it, there was no second person, and there was no so-called accomplice, but through Feng Yan and Wu Yu's handling of the case, the police had already mastered the evidence that she was not the real murderer, so this whole afternoon, she was grinding hard with Cheng Fei, asking her to explain who the real murderer was, but Cheng Fei has always denied that there is a second person involved, only saying that she did all this thing. The process is exactly the same as the investigation process, that is, she secretly put the song into the playlist, calculated the time for Zhou Yang to go to the bridge, let him enter fatigue driving, and then rushed into the river and died.

The whole interrogation process was extremely depressing, and the police could obviously feel that Cheng Fei knew who the real murderer was, and she was taking the blame alone, she just didn't say who the real murderer was.

Just when there was no way to break through the interrogation of Cheng Fei in the bureau, news came from Shanghai, and Fan Qihao actually admitted that he was the real murderer.