Questions are mounting about why an Oklahoma sex offender accused of killing six people and himself was ever freed from prison in the first place.

An Oklahoma sex offender who was released early from prison shot his wife, her three children and their two friends in the head and then killed himself, authorities confirmed Wednesday as concerns grew about why he was free in the first place.

Law enforcement officials in Oklahoma are staying silent while they piece together what led to the killing of seven people on a rural property, including a registered sex offender.

A Michigan man devised a plan to steal a helicopter from the Coast Guard in order to attack a police station and shooting up a hospital to disrupt the power and free the coronavirus (COVID-19) patients, authorities said.