Few ideas

1. Post mortem on chuhi will show that wound doesn't fit with close range, bullet is not from avnis gun

2. Finger prints on the car that vidyut was driving and abandoned on the road which Neil recognized as vidyuts

3. Footprints of ballu/vidyut in the jungle, road

4. Track ballu down

5. Vidyut in his acting definitely gave hints that he was lying. So if Neil broke down his exact words he can use his words against vidyut. How did vidyut know how long it's been since the incident happened? How did he know that there were any witnesses ?

What I don't get is if why there is a leap? Surely avni is not gonna be in jail for that long for a crime she didn't even commit right?! That would be terrible. Hope she escapes from jail if that'sthe case!

Plus how did Vidyut know where they were killed? And that there was a water body? He said meri bacchi ko tairna nahi aata hai.

Neil has already started thinking about the other gun. Continue hunting for that clue.

Mishti. Find mishti too.

Avni has to tell neil that ballu was there, and she shot him. Ballu got a bleeding wound. They could find blood samples. Yaha dna kara lo. And bam! Someone else was there too. Enough proof to stall avni's jail yatra.

Juhi's call logs. last call was made to Vidyut.Where as he said that she sent him the video earlier that day

They should not skip over tge fact that juhi was in police custody when the jeep was bombed and mishti was kidnapped. These things can be used in Avni's defense, stating that there is more to the story than meets the eye.

Hope massive loopholes are not left behind. And each thing which has happened has some significance.

Vidyut can give alibi for his presence elsewhere but Avni-Neil would know it.. It's only time to gather the evidences and trap him.. 😉