The family of Seth Rich, a staffer for the Democratic National Committee who was murdered last July in Washington, D.C., has launched a crowdfunding page to raise money for investigating the unsolved case.

Aaron Rich, the brother of the victim, created the GoFundMe page on Sunday to draw attention to the unsolved crime that took place July 10 in the Bloomingdale neighborhood of Northwest D.C. and raise $200,000.

"One thing that no one tells you, and something we weren't prepared to hear when we lost Seth, is that if a case isn't solved immediately, it could take months or years before justice is served. Worse, to keep the investigation active, to seek leads and to follow up on investigations, to make sure that every possible angle is covered—it's expensive," Rich wrote on the website.

"My family isn't wealthy and because we lack the funds or resources to make sure we are doing what we can to aid Washington's police department, we've had to rely on help. Experience has taught us that we need help, and we need help that is free from any ulterior motives or with any strings attached. That's why, with a heavy heart, I have started this fund."

Rich blamed the "caustic political environment" that has churned out conspiracy theories "every few weeks" for preventing credible information or other evidence from being the focus of the issue.

Donations will go toward public awareness campaigns; hiring investigative, forensic and analytical services; and possibly increasing the reward for anyone who gives information that leads to an arrest and conviction. Currently, the campaign has raised $4,553 from 88 donors.

Last September, Republican lobbyist Jack Burkman announced a $100,000 reward. A month earlier, WikiLeaks said it would pay $20,000 to anyone who could explain who was behind the attack. The Metropolitan Police Department is also offering as much as $25,000 to anyone who tips them off to the perpetrator.

Rich was originally from Nebraska and was known as a rising star within the Democratic organization. His death came weeks before WikiLeaks leaked thousands of DNC emails, which hurt the party by creating the impression that leaders favored Hillary Clinton over Bernie Sanders from winning, which has caused some to wonder if WikiLeaks had been working with Rich before his sudden death.

Rich, 27, was the Democrats' director of voter expansion data. Early Sunday morning, he was shot multiple times in the Bloomingdale neighborhood of the nation's capital. Police officers soon arrived on the scene, but Rich died shortly after at a local hospital.

Police reportedly do not have any witnesses and are searching for surveillance footage of the incident.