Kenya's autarkic constabulary oversight assemblage has launched an probe into the decease of a antheral who had been detained "for mendacious publication", the constabulary person said.
Albert Ojwang was arrested successful the occidental municipality of Homa Bay and past driven 350km (220 miles) to the capital, Nairobi, his begetter Meshack Opiyo told journalists.
"While successful custody, the fishy sustained caput injuries aft hitting his caput against a compartment wall," a constabulary connection said. He was rushed to infirmary "where helium was pronounced dormant connected arrival".
The manager of the Kenyan subdivision of rights radical Amnesty International told the BBC that the decease of Mr Ojwang, described successful reports arsenic a teacher and blogger, was "very suspicious".
Amnesty said in a statement that his decease "raises superior questions that indispensable beryllium urgently, thoroughly, and independently investigated".
Senior constabulary serviceman Stephen Okal is quoted by the Star newspaper arsenic saying what happened successful the compartment was "an attempted suicide".
It is not wide what the complaint of "false publication" referred to, but Mr Opiyo told online quality tract Citizen Digital that the arresting constabulary serviceman said "Albert had insulted a elder idiosyncratic connected X", the societal media platform.
Referring to the circumstances of his arrest, Amnesty International Kenya manager Irungu Houghton said it was "quite shocking" that Mr Ojwang was not booked successful astatine the section constabulary presumption aft being detained, but was alternatively taken connected a agelong journey.
He called connected the autarkic investigators to unafraid what helium described arsenic "the transgression scene" astatine the constabulary presumption successful Nairobi.
The constabulary said that Mr Ojwang was "lawfully arrested".
His detention and decease comes astatine a clip of rising interest astir however immoderate authorities critics are being treated.
Last week, software developer Rose Njeri - who created a instrumentality to assistance radical reason a authorities concern measure - was charged with violating a cybercrime law.