Marivaldo dos Santos, a 46-year-old colonist, was stabbed to death by his 54-year-old brother-in-law in the rural settlement of Tupá, located in Xapuri, Acre. The incident occurred late on Friday night, and law enforcement was alerted around 11 PM following reports of a homicide in the area. Upon arrival, police found Santos lifeless in his residence, and the suspect was discovered on the premises showing signs of intoxication, leading to his immediate arrest.

Initial investigations by the Civil Police suggest that the two individuals had engaged in a heated argument prior to the stabbing. It appears there was a struggle between them before they reconciled and continued to stay on the property together. This tragic incident raises concerns about domestic violence and the potential for conflicts among family members, particularly in isolated rural areas where access to support services may be limited.

The case highlights the risks involved in familial relationships, especially under the influence of alcohol, as indicated by the suspect's state at the time of his arrest. This incident is a stark reminder of the importance of addressing conflicts constructively to prevent such violent outcomes in the community, which is still grappling with the implications of this heinous crime.