people who didn't get it!!! film explained SPOLIERS!
Koyla is simple guy who is good at using his hand. He build his house fixes every ones cars,etc.. he says that they have already lost other appeals... and he is not legally smart
Koylas wife is tired of being called names by the son, after his mothers death... Knowing that Koyla is now only obsessed with complaining about everything, being it from helping people. government taking his house, the corruption, complaining why his friend shoots all the bottles on his birthday, in a nut shell he is complaining why his life sucks, Koyla is portrayed as a Pessimist. Dimitri on the other hand is an optimist, he has constantly belief that things will work out and that all hurdles will be concurred. Thats why she sleeps with him.
3 people in the Mayors office, are the chief of police, the prosecutor and the court official. All of them have purpose to indicate that the reason why his claims were never taken by nobody wasn't because of "no one is here" or some other potential excuses but because they are in the same boat as the Mayor.
Dimitri and Kolyas wife, was only a fling, she wanted to escape the harsh reality of her husband losing control and blaming everything, her future life leaving in a 1 run down bedroom apartment that looks like some homeless people got evicted from. When Dimitri tells her come with me, she asks what you mean, because she feels and knows that their have no future together, whether it be that Dimitri already has a family and says that because he feels it's his fault that their got caught or that they did it.
Dimitri Left after the threats for various reason, Kolya was no longer his brother and despised him, Kolyas Wife chose her husband over him, he no longer had any emotional attachments to the case. Before he was helping him whether it was because of his need to help his "Brother" army comrade and to sleep with his wife, now there is none of that, but also we can not certain that Dimitri didn't have a daughter and he left because of the threat of the mayor towards last words for your daughter.
Kolyas wife clearly commits suicide, that is because Roma hates her now even more and wishes that she wasn't here, she lives with a man that despite's her and hates himself, she gets up to never ending job which has no purpose in life, and she feels that she has no purpose in life. Also it is very evident that she is standing looking into the ocean by herself.
Last the church. we are told by Kolya near the start of movie that the land where his house is built is prime land, maybe because of its location to the bridge and easy access around other areas where it is next to a mountain or something. We are told that the real value of the house and land is some where around 3-3.5 million Rubles not the 600 thousand. the abandon church was somewhere on the hill and in every shot that they showed exterior, showed no roads and uneven grounds, we do not known what happened to that church. So there is no need to justify by saying they could have easily rebuilt it, maybe no one went to the church because they needed to climb rocks, and go uphill near a cliff to get to it.
Also all the cars leaving the church were mostly 4x4 and expensive cars, showed that this church was built for the "rich"
so the prime location and easy access, Car park right next to the church no walking needed, all add up to comfort factor.