The clue is that...

Jim observed that exactly night at 10pm the only tree in front of the orphanage starts to move by wind for 1min and stopps suddenly. once again at the gap of 5minutes the tree starts to move by wind for 1min and stopps all of a sudden which he found mysterious.

If there are more trees one can easily identify the trees moment by watching the footage but there is only one tree in front of the orphanage and it is also very big.so the tree can not be completely covered in the footage only 2-3 branches can be seen in the corner of the left side of the footage.So it became very difficult for every one to notice who ever seen.

After returning from school in the afternoon Jim and Jam finishes their lunch and starts to do their own routine work.

Jam takes the pen drive in which he downloaded the footage. He maximises it and sees the footage once again in his laptop where he felt suspicious.

By looking at the tree Jam starts to think continously......

The only way to kidnap with out being seen in the footage is through air .so the Kidnappers must use the private helicopter to kidnap the children. So the sudden wind which moves the tree is due to the helicopter.

Atlast he succeeded:

If the helicopter enters the sea port it will be recorded in the footage but no helicopter is landed there.so he looks for the other alternatives

He searches the surrounding areas of the orphanage to get more information through the navigation. Nearly 4km from the orphanage there is a small village attached to the sea port.

Through road it takes half day to enter the seaport but there are 2 check posts and CCTV cameras installed through out the road.so it will be difficult for them to take the children to the sea port through the road.

The only way to take the children to sea port is from the village .Nearly, from the village it takes 4days to enter sea port through a small path which is surrounded by the forest .No CCTV cameras are installed there.

The wild animals moves freely in the path and tries to attack the people who uses the road. So no one dares to use it. So the kidnappers might take the road to bring the children to seaport.

But one thing he can't understand that how the head of the kidnappers knows about the details of the children and how can he get a private jet which is costly to maintain.

Because only few people in the city Y have permission to use their private jet. so some one must be more rich and powerful to use the helicopter. So to implement this plan the man must be the most influenced person in the country.