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

Protesters have taken to the streets of the Kenyan capital to vent their anger over the death of a blogger in police custody. Albert Ojwang was arrested June 5 in Homa Bay in western Kenya and