By Aaron Ross NAIROBI (Reuters) -When the policemen came for Albert Ojwang - the Kenyan blogger whose death in custody sparked protests this week and prompted a rare acknowledgement of police brutality by the president - his wife initially thought he would be safe.

Authorities in Kenya have arrested a senior police officer responsible for the cell where a blogger died, leading to widespread protests in the capital, Nairobi, that left dozens injured

The blogger’s death comes almost a year after several activists and protesters were killed and abducted by Kenyan police during finance bill protests. The rallies led to calls for the removal of Ruto, who has been criticized for what some say is his authoritarian streak.