Michael Swinyard, 67, was the fifth and final victim killed in Monday’s shooting rampage in Denver and Lakewood, the Denver Office of the Medical Examiner announced Wednesday.

He died of gunshot wounds and the medical examiner ruled his death a homicide.

Swinyard lived in the One Cheesman Place apartment building at 1201 N. Williams St., where the third shooting took place Monday night.

The gunman wrote a trilogy of books using the pen name Roman McClay. In the books, a character with the same name as the gunman carries out murders similar to Monday’s rampage.

In “Sanction Book 1,” the shooter kills a man named Michael Swinyard in an apartment on Williams Street overlooking Cheesman Park.

Swinyard’s roommate, the owner of the condo, did not answer a call seeking comment Wednesday.

In June 2017, Swinyard was indicted on a dozen counts in the biggest illegal marijuana grow operation since Colorado legalized cannabis. He later pleaded guilty to a single charge of misdemeanor possession. According to court records, 61 others were charged, as well as 12 businesses.

A call to Swinyard’s attorney was not returned Wednesday, and a spokesman for the attorney general’s office declined to comment on the criminal case involving Swinyard.

On Monday, the gunman killed two women and injured a man at First and Broadway and shot at people in the 200 block of West Sixth Avenue before killing Swinyard. After the condo shooting, he killed two more people in Lakewood and got into three shootouts with police before being killed by an officer.

The other four victims who were killed were 44-year-old Alicia Cardenas, 35-year-old Alyssa Gunn-Maldonado, 38-year-old Danny Scofield and 28-year-old Sarah Steck.

Two others — Jimmy Maldonado, husband of Gunn-Maldonado, and a female Lakewood police officer — were shot but survived.

The gunman died Monday night during a shootout with the Lakewood police officer, whose name has yet to be released.

Police said the shooter knew most of the victims through personal or business relationships and specifically targeted them. Detectives were still investigating his motives.

It was unclear how the gunman knew Swinyard.

Denver Gazette reporters Dennis Huspeni and David Mullen contributed to this report.