The incident was reported about 9:30 p.m. Sunday at a home just north of SE Everett Mall Way.
The older brother's girlfriend reportedly told police she saw the incident transpire. She said the man “became upset about (the brother) not leaving any mashed potatoes for him,” according to the arrest report.
The younger man then grabbed a large kitchen knife, held it in a threatening manner and threatened to stab his brother, police allege.
The suspect was booked into Snohomish County Jail for investigation of second-degree domestic-violence assault.
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