TOWANDA, Pennsylvania — Accused killer mom Metallica Rose Harrison was hit with a gas shutoff notice over a $30 unpaid bill days before she allegedly murdered her husband and 3-year-old son.

The 27-year-old mom was booked on two counts of criminal homicide Tuesday, one day after she allegedly stabbed her husband, Charles Harrison, and their son, Tristan, in the chest at the Great Wolf Lodge in Scotrun, PA, cops said in a statement.

While they were away on their Poconos vacation, a bright yellow “72 hour shut off notice” from Valley Energy was taped to the front door of the family’s home.

The note — dated Oct. 5 and addressed to Harrison — warned that her gas service could be disconnected on or after 8:00 a.m. on Oct. 8 over the unpaid balance of $29.05.

The Post has reached out to Valley Energy for comment.

Prior to checking into their Poconos vacation on Sept. 21, Harrison allegedly drained her husband’s 401(k) to pay for the trip, which was scheduled to end on Oct. 5.

Instead, that day, the family formally extended their stay, setting a revised checkout date for Oct. 13.

The total for their stay is believed to be around $6,000 — at $300 a night.

Hotel security records Harrison, Charles and Tristan entering the hotel room just before 7 p.m. Sunday.

The couple later left the room to visit the resort arcade, returning to room 2030 at 11:22 p.m., according to a criminal complaint seen by Fox News.

The next day, shortly after 1:30 p.m. Monday, Harrison called 911 after allegedly killing her family to ask where she could find the right vein to end her own life, police said.

She allegedly told the operator she was “too weak to stab my neck,” adding that she had knives but they were “not working,” and she needed “help dying,” according to a criminal complaint.

A preliminary court hearing is tentatively scheduled for Oct. 21, when a judge will determine if there is sufficient evidence to send the case toward trial at the Monroe County Court of Common Pleas.