The US Department of State, through the Bureau of Democracy Human Rights and Labor, published its report on Human Rights practices in Bahrain during the year 2015. Their full report can be found here or here on pdf format.
"[...] significant human rights problems included lack of judicial accountability for security officers accused by the government and nongovernmental organizations (NGOs) of committing human rights violations; defendants’ lack of access to attorneys and ability to challenge evidence; prison overcrowding; violations of privacy; and other restrictions on civil liberties, including freedom of press and association. Societal discrimination continued against the Shia population, as did other forms of discrimination based on gender, religion, and nationality. The government at times imposed travel bans on political activists in conjunction with arrest charges and in some cases continued to enforce them after authorities had dropped charges or pardoned the individual. The government maintained the revocation of citizenship for 31 individuals whose citizenship it revoked in previous years, and it revoked citizenship from another 72 who were not otherwise charged with any crimes. There were reports of domestic violence against women and children. Despite government efforts at reform, the rights of foreign workers, particularly domestic workers, continued to be restricted, leaving them vulnerable to labor abuses and human trafficking."