For the second time in the history of his incarceration, convicted killer Michael Douglas Sheets, 48, has escaped from prison.

Sheets was not accounted for during a routine inmate check on Saturday evening at Mission Institute minimum-security prison in the Lower Mainland.

He firebombed a home in Calgary in 2004, killing a five-year-old boy and his four-year-old sister and seriously injuring their mother. He is serving 14 years for the crime.

And this isn’t his first prison escape. He was convicted of escaping custody from the William Head Institution on Vancouver Island in February of 2015.

Sheets is not the only prisoner to escape the MIssion facility this month. John Norman Mackenzie, who was serving a life sentence for second-degree murder, escaped in early August.

Sheets is five-foot-six and weighs 141 pounds. He has hazel eyes, white hair. fair complexion, and is known to use the alias John Hala.

WillIam Head and Mission Institute are run by the federal corrections service.

Source: Castanet