A Globe Spotlight Team report on Steward Health Care

On the whole, Steward’s more than 30 hospitals have been among the worst, the most troubled in the country over the last five years, according to several measures.

The Spotlight Team identified at least 15 instances in which Steward Hospital patients died after failing to receive professionally accepted standards of care due to equipment or staffing shortages.

See key moments in the explosive growth and ultimate collapse of Steward Health Care.

In the past five years, Steward hospitals accrued more than 300 deficiency findings from federal hospital regulators.

A Globe analysis rounds out a globetrotting portrait of how Steward CEO Ralph de la Torre and other executives spent their time — and the company’s money — in the months and years before it went under.

Corporate boards are supposed to hold the CEO accountable. In Steward’s case, it did anything but, according to a new Spotlight investigation.

The Boston Globe Spotlight Team has spent months investigating this unusual partnership to lay bare another critical piece of the Steward saga.

Executives at Steward Health Care have treated their in-house malpractice insurer, TRACO, like a piggy bank, pulling cash from it at will, and severely depleting the assets meant to cover claims of medical harm.

The move marks an escalation in the sprawling federal criminal probe into the national health care chain.

Several Steward board members have been summoned or subpoenaed to answer questions as part of the sprawling federal probe.

A new Spotlight investigation reveals that as Steward Health spiraled toward bankruptcy, the CEO used its bank account as his own.