Katherine Clark, the House Democratic whip, tweeted: “Last night, my daughter was arrested in Boston, Massachusetts. I love Riley, and this is a very difficult time in the cycle of joy and pain in parenting.
“This will be evaluated by the legal system, and I am confident in that process.”
Riley Dowell, 23, was detained on Saturday night in Boston, Massachusetts after allegedly spray-painting a monument and assaulting a police officer during clashes.
In a statement on its website, the Boston Police Department said Dowell was expected to be arraigned in Boston Municipal Court.
Officers responded to a reported incident at the Parkman Bandstand Monument in Boston Common.
They located an individual who has been identified as Dowell, vandalising the monument using spray paint to write anti-police messages, police said.
”A group of about 20 protesters began to surround officers while screaming profanities though megaphones on the public street causing traffic to come to a standstill,” police said in a press release.
They said that “an officer was hit in the face and could be seen bleeding from the nose and mouth”.
Dowell now faces several charges, including assault by means of a dangerous weapon, destruction or injury of personal property, and damage of property by graffiti/tagging, according to law enforcement.
Previously this month, a deadly police shooting took place in Cambridge, Massachusetts, just outside of Boston. The incident ignited protests regarding the use of force by law enforcement. Sayed Faisal, 20, a student at the University of Massachusetts Boston, was fatally shot by Cambridge police.
The authorities said he had moved towards officers holding a kukri, a type of sword, and a non-deadly “sponge round” didn’t stop his advance.
Ms Clark is in her sixth term in the House and represents the state’s 5th Congressional District.
The 59-year-old was named as the new Democratic House whip in November after the previous party leadership in the House stepped down following the midterm elections.