there -- and, after hosting ukraine peace talks in the capital minsk, the country's president alexander lukashenkoeven keen now to portray himself somewhat as a peacemaker. but the problems in belarus are still very much there - as our reporters found out when they met up with a mother who says her son was wrongly executed. reporter: lubov kovalyova feels compelled to speak about her pain -- again and again. she tells how her son vladislav was executed in march three years ago. he was 26 years old. his mother doesn't know where to go with her grief. she doesn't know where her son was buried. lubov: we don't have a grave. that's why, when our neighbors heard that vlad was no longer alive, they laid flowers right in front of our door. and now here they are. he was such a good-looking, intelligent boy. a good boy. reporter: vladislav kovalyova and a friend were accused of setting off a bomb in the minsk subway in april 2011. 15 people died in the attack. some human rights activists regard the proceedings against them as a show trial based on coerced, false confessions. but they were both found guilty