Here's the WaPo article that's linked in the tweet:
Houston police chief Art Acevedo urged Congress to act on the issue of gun violence Wednesday, saying "our streets, our neighborhoods are truly drowning in the blood of our victims and in the tears of their loved ones.”
At a hearing of the House Judiciary Committee dedicated to gun policy, Acevedo declared, “Gun violence is arguably one of the greatest public health epidemics facing the nation everyone in this room loves and serves."
“Chiefs of police and sheriffs join the victims in asking you to act now to prevent one more death and bloodshed," he said.
...
In the past, Acevedo has been outspoken about his desire for increased gun-control measures. His congressional remarks came the week after four Houston police officers were shot and a fifth injured during a drug raid, after which Acevedo expressed “frustration” with lawmakers. “For whatever reason, they offer a lot of prayers ... We didn’t elect people to pray for us. We elect people to lead us; we elect people to make public policy decisions.”