Those given maximum penalty are - Abul Hossain Master, 52, Habibur Rahman Habib, 42, and Abdur Razzak, 35.
Convicts who were sentenced to life in prison are - Abdullah Al Kafi, 22, Ruhul Amin, 30, Rustam Ali, 26, and Monirul Islam alias Monir, 23.
Rajshahi Speedy Trial Tribunal Judge Anup Kumar also fined the convicts Tk 10,000 each. If they fail to pay the fine, they will have to spend six more months in jail.
According to the prosecution, Aklima Begum, 45, of Deula village in Bagmara upazila was at loggerheads with her brother-in-law Abul Hossain.
On November 24, 2014, Abul and the other convicts attacked Aklima’s house. They slaughtered the woman and her 25-year-old son Zahid Hasan.
A case was filed over the murder.
Alamgir Hossain, inspector of Police Bureau of Investigation, pressed charges against the convicts in court on May 31 last year.
Forty-seven witnesses testified before the court.