Boston Celtics guard Terrence Williams was arrested Sunday in Washington State on charges of brandishing a firearm. According to police, the incident happened during an argument with the mother of his 10-year-old son. When Williams arrived to pick up his son, he got into an argument with the boy’s mother. During the argument Williams allegedly made threats and brandished a firearm.

Williams was later tracked down by police and arrested, though his gun was not found. He appeared in court yesterday in Kent, Washington, where a judge set his bail at $25,000.

According to the Boston Herald, officials with the Celtics have declined to comment on the situation, the organization is said to be conducting its own investigation of the incident, per policy.

Williams came to the Celtics late last season after playing for the Nets, Rockets, Kings, and a team in China. He played a handful of games – including two playoff games – last season. The Celtics have signed him to a $948,000 contract, provided he earns a spot on the team’s roster during training camp.