A Ukrainian man as he pushed his bicycle along a road.

The sergeant faces life in prison.

Last correspondent Sarah Rainsford was in court and she sent us this report.

This was a major moment for Ukraine.

The first Russian soldier accused of a war crime already up in court.

Vadim Shishkin marin is a Russian tank commander.

He's on trial for shooting and killing a civilian all the time the widow of the man killed was just the other side of the glass.

The soldiers seemed nervous and said little until the words that mattered asked whether he admitted his guilt, Madam Sushi marin told the judge Yes, completely.

It was the very start of this war.

As Russian tanks rolled south through sumi Vadym Sushi marines unit came under attack then and were forced into retreat In the chaos.

He and four others ended up fleeing in a stolen car.

Katarina describes seeing the Russians through her gate but her husband was out in the street.

She later found his body lying here.

The soldiers had seen him on his phone and Vadym session marin had killed him, Alexander was 62.

He was shot four times in the head.

This was the first time his widow had seen the man responsible.

So I asked how she coped, I feel very sorry for him, Katarina told me, but this crime, I can't forgive Ukraine knows most of those.

It accuses of war crimes may never be prosecuted.

The suspects sheltered by Russia, but this soldier surrendered.

His only defense that he was following orders.

Those in Moscow who sent him to this war have not even made contact with his lawyer.

The prosecutor is asking for a life sentence.

So I asked him how fair this trial could be.

We follow all the laws and all the norms.

The trial is open.

If there was any violation by us, Cameron could have said so he has all the rights accorded to him by Ukrainian and international law.

This trial is taking place extremely quickly and of course it's happening in the middle of a war, but everyone here knows that they're under scrutiny.

They know they have to be transparent and what Ukraine says is that it's not looking for scapegoats.

This is not a show trial.

They want Justice Sarah answered.