U.S. Rep. Sean Casten's 17-Year-Old Daughter Has Died

Gwen Casten, the 17-year-old daughter of Illinois Rep. Sean Casten, has died, the congressman's office confirmed in a tweet Monday.

Casten's office did not add any information about her cause of death. The Chicago-Tribune reports that Downers Grove police said they were called to a home in the area Monday, 

"for an unresponsive seventeen year old female," where "first responders determined that the subject was deceased."

The teenager graduated from Downers Grove North High School in May and was headed to the University of Vermont in the fall to study environmental science.

She recently appeared in a campaign video supporting her father's bid for reelection and detailing how turning 18 would signify a "big year."

In an Instagram post, the AAPI Student Union at her high school said it was "heartbroken over the loss,"

going on to describe the "key role" Gwen played "in bringing about positive change" to her high school.

"Gwen was a leader and a friend ... She was a highly accomplished student at North, being involved in various activities, from Changemakers, band, NHS, math team, and tennis, all while being on the high honor roll.

Gwen and her father @repseancasten recognized the importance of protecting the environment and the dangers that arose if we kept polluting our planet."