Rafael Ramos and Wenjian Liu were murdered on patrol in December . Their families threw out the ceremonial first pitch at the Mets ' home opener . The NYPD has been criticized for its handling of the case, with some saying that officers did not follow protocol or used proper tactics to subdue a suspect who was armed with an AK-47 assault rifle. Tom Brady and 'American Sniper ' widow Tara Kyle also threw first pitches .
Rafael Ramos and Wenjian Liu were murdered on patrol in December . Their families threw out the ceremonial first pitch at the Mets ' home opener . They were joined by Mayor De Blasio , who was booed when introduced . Tom Brady and 'American Sniper ' widow Tara Kyle also threw first pitches .