The man who allegedly assassinated a Democratic Minnesota state representative, murdered her husband, and shot a state senator and his wife at their homes in a violent spree early Saturday morning may have gotten their addresses from online data broker services, according to court documents.

Suspect Vance Boelter, 57, is accused of shooting Minnesota representative Melissa Hortman and her husband, Mark Hortman, in their home on Saturday. The couple died from their injuries. Authorities claim the suspect also shot state senator John Hoffman and his wife Yvette Hoffman in their home earlier that night. The pair are currently recovering and are “incredibly lucky to be alive,” according to a statement from their family.

According to an FBI affidavit, police searched the SUV believed to be the suspect's and found notebooks that included handwritten lists of “more than 45 Minnesota state and federal public officials, including Representative Hortman’s, whose home address was written next to her name.” According to the same affidavit, one notebook also listed 11 mainstream search platforms for finding people's home addresses and other personal information, like phone numbers and relatives.

The addresses for both lawmakers targeted on Saturday were readily available. Representative Hortman's campaign website listed her home address, while Senator Hoffman's appeared on his legislative webpage, The New York Times reports.

“Boelter stalked his victims like prey,” acting US Attorney Joseph Thompson alleged at a press conference on Monday. “He researched his victims and their families. He used the internet and other tools to find th...