Slimane Bouhafs was imprisoned for three years and denied medical treatment meanwhile on blasphemy charges for Islam-critical Facebook posts.
Thilleli, Afaf, Lyly (daughters)
In August 2016, Algerian Christian Slimane Bouhafs, an advocate for religious freedom and minority rights in the country, was convicted of blasphemy. He was accused of making Facebook posts that were insulting to Islam, which reportedly included a depiction of the Prophet Muhammad “as a terrorist.” He had also apparently denounced the "Islamization" of Algeria and was a member of a group opposed to Islamic "colonialism."
“[Slimane Bouhafs] shared four distorted Qur’anic verses and photos offensive to the Prophet, as well as articles denigrating the Islamic religion.” - judge’s statement
He had apparently not posted any of the offending content himself, but only shared the posts of others. An appeal did not keep him out of prison, and there may have been procedural violations that infringed on Slimane’s right to due process. His final sentence was to three years in prison.
“My father is in a critical condition because of his illness. He suffers from inflammatory rheumatism, and needs a specific diet which is impossible to get in prison. He drinks only coffee and has lost a lot of weight in this short time since his detention.” - Thilleli Bouhafs, Slimane’s daughter, appealing for a presidential pardon
At least one protest advocating for Slimane’s release took place in the months following his sentencing and imprisonment. In July 2017, after his wife and daughter lobbied on his behalf, he was granted a partial commutation of his sentence by Algeria’s president. He was then released in March 2018.
Algeria: 3-Year Sentence for Insulting Islam - Human Rights Watch

While the Algerian Constitution has various articles that explicitly guarantee freedom of speech and creed (e.g., articles, 36, 38, and 41), the Algerian penal code explicitly criminalizes blasphemy in Article 144-2, which stipulates that "whomever denigrates the Prophet and other Messengers or the creed or prophets of Islam through writing, drawing, declaration, or any other means, will receive three to five years in prison, and/or be subject to a fine of between 50,000 and 100,000 Algerian dinars." Apostates are forcibly disinherited and, in some cases, divorced from their spouses and deprived of child custody. The constitution declares Sunni Islam as the official religion.