"Trying to mix chemicals into this highly addictive drug can be very explosive and flammable," he said. "That's what we saw taking place."
Maine police: 1 dead, 4 others detained after meth lab fire →
"This is the first arrest as a result of the work of the unsolved-homicide unit. And there will be others as the work continues," McCausland said.
Dad charged 38 years after baby son's death with killing him →