Thousands mourn slain officer as Las Vegas probe goes on

Veronica Hartfield, stands with her son, Ayzayah Hartfield during a candlelight vigil for her husband, Las Vegas police officer Charleston Hartfield, Thursday in Las Vegas. Hartfield was killed during the Sunday night shooting at the Route 91 Harvest country music festival. (AP Photo/Gregory Bull)

LAS VEGAS (AP) — Las Vegas gunman Stephen Paddock booked rooms over other music festivals in the months before opening fire on a country music festival, authorities said, while thousands came out to mourn a police officer who was one of the 58 people he killed.

Paddock booked rooms overlooking the Lollapalooza festival in Chicago in August and the Life Is Beautiful show near the Vegas Strip in late September, according to authorities reconstructing his movements before he undertook the deadliest mass shooting in modern U.S. history.

Fenway Park in Boston also came up during the investigation of Paddock, Boston police Lt. Detective Mike McCarthy said Thursday, though he provided no further details.

It was not clear if he contemplated massacres at the other sites.

The details came to light as investigators struggled to figure out why the 64-year-old high-stakes gambler opened fire on a crowd of 22,000 Sunday night from the 32nd floor of the Mandalay Bay hotel casino. He killed 58 and injured nearly 500 before taking his own life.

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