 Zavadsky had received threatening phone calls before his disappearance, and his neighbors saw two men trailing him near his apartment building on the day he disappeared.The witnesses helped police artist compile composite drawings of the two men, but the police refused to release them to the public.According to the Committee to Protect Journalists, its sources in Belarus suspect that Zavadsky was murdered because he had footage showing Belarusian security agents fighting in Chechnya alongside Chechen rebels.