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

Police used tear gas to disperse crowds gathered close to the capital’s parliamentary building on Thursday to protest against the death of Albert Ojwang, a 31-year-old blogger arrested in the western town of Homa Bay last week for criticising the country’s deputy police chief Eliud Lagat.