Former Rep. David Nangle talks gambling addiction in Mass.

A WBUR investigation found that the number of people in their 20s and 30s calling the Massachusetts's problem gambling hotline and getting referred for treatment has more than doubled since the state legalized online sports betting.

Former state Rep. David Nangle has a personal connection to the issue. Nangle represented parts of Chelmsford and Lowell for two decades until his own gambling habit landed him in prison.

Nangle joins WBUR's All Things Considered to share his story and to deliver a message for lawmakers.