Police Investigate Possible Additional Murders by Fentanyl Poisoner

Luke D'Wit, sentenced for killing a couple, is now suspected in the deaths of his father and grandfather.

Luke D'Wit was sentenced to life for the murders of Stephen and Carol Baxter using fentanyl.
Authorities are now examining the deaths of D'Wit's father and grandfather for potential foul play.
D'Wit manipulated the Baxters over several years, creating fake identities to gain their trust.
Evidence suggests D'Wit retained fentanyl patches prescribed to his father, which he used in the murders.
Police stress they will act on any new evidence uncovered during the ongoing review.