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He killed his brother with a knife after an argument
After a heated argument, a man, identified as Arley Perdomo, killed his own brother with a stab wound to the chest in Montalbán, Carabobo state.

TL;DR
- A man named Arley Perdomo fatally stabbed his brother.
- The incident took place in Montalbán, Carabobo state.
- The killing occurred after a heated argument between the brothers.