Brazil, the execution took place on February 26. The suspect was arrested on Sunday April 12 along with a possible accomplice.
He was already sought by police and together with him a friend was arrested who is also investigated for involvement in other crimes.
The victim was walking on the sidewalk and with him two daughters aged between 8 and 13, and a grandson of 2 years. CCTV shows the children running away when they saw a car approaching.
A man comes out of the vehicle and shoots several times at the victim.
Along with the arrested suspects, police seized 3 rifles, a pistol, bullet proof vests and radios for communication. The duo is suspected of several murders, motivated by his mother's murder of one of them in late November 2014.
The target now was one of the arrested criminals for that crime. After the woman's death, several people were killed for revenge, says the police. Some of the victims had no part in the murder, but were killed simply because they have some connection to the suspects.