A retired nurse in her 90s testified how her questions helped uncover thefts committed by a west suburban financial institution account manager who was sentenced Monday to four years in prison.

Christine Lang, 48, of Summit, was sentenced Monday on a count of felony theft in DuPage County court. The former account manager at the Trust Company of Illinois in Downers Grove, stole $328,000 from the accounts of three elderly clients and spent much of the money at riverboat casinos, DuPage County prosecutors said.

One of the victims, a woman in her 90s, testified at Lange’s sentencing hearing that she called Lange in 2016 when TCI failed to mail her quarterly statements. Lange promised to send a statement but failed to do so, the woman said. TCI finally mailed her a…