If the police can plant malware on a device, then they can also plant evidence on a device. What percentage of these people are being framed? 10%? 50%? No way of knowing.
Well, presumably not the ones with "77 firearms, including an AK47 assault rifle, sub machine guns, handguns, four grenades, and over 1,800 rounds of ammunition" or "More than two tonnes of Class A and B drugs have also been seized by police, as well as 55 sports cars, 73 luxury watches and over 28 million street Valium pills – a drug that has caused a number of deaths in Scotland."