LEWISTON, MAINE: Colby Card, the 18-year-old son of the Maine mass shooting accused Robert Card, 40, was in hiding with his mother while the manhunt for the army reservist was underway till October 27.

The accused, Robert Card was found dead on October 27 near a river in Lisbon, seemingly from a self-inflicted gunshot wound.

Card shared Colby with his former wife, Cara Lamb, 39, whom he married in 2005. The couple went through a divorce two years later, according to the New York Post.

Initial reports had suggested that Card might have been attempting to locate an ex-partner during the deadly shooting incident that occurred at a restaurant and a bowling alley on the night of October 25.

Robert Card and Cara Lamb jointly filed for divorce in 2007

Card was suffering from mental health issues, which has been acknowledged by his other family members.

The divorce agreement was amended in 2013, with the new version including a requirement stating, "It is further ordered that all guns in either party’s home shall be under lock and key during which time they are not being used.”

Card, who described himself as self-employed, represented himself throughout the proceedings that lasted several years.

He was ordered to pay $74 per week for child support in 2013.

Colby Card was reportedly intended recipient of mystery note left by Robert Card

Maine Commissioner of Public Safety Michael Sauschuck confirmed on October 27 that investigators have discovered a letter penned by Card.

The discovery was made at the suspect's unkempt home in Bowdoin on October 26, reported CBS News, and was reportedly addressed to his son.

According to law enforcement sources cited by CNN, the note "contained information and instructions for others regarding the location and disposal of certain items," indicating that "when it was discovered or read, Card would no longer be alive."

The note also reportedly included lengthy rants and extensive details about Card's bank accounts, as per the Daily News.

However, the motive behind the mass shooting could not be determined from the note's contents.