This also occurred in Thailand a few years ago, and it's a very sad story of (military) politics triumphing over reason.
During the early years of the Thaksin Shinawatra government, Pornthip Rojanasunand, a very high-profile CSI official, claimed that there was corruption in the Thai police. She became something of a media personality, and a National Geographic documentary was even made of her. She became very popular with the Thai military, who are rivals with the police and eventually launched a coup to remove Thaksin from power. After the coup, the military government spent over $20 million on the "bomb detectors" (not including "commissions") for and gave them to patrols in the deep South to deal with Muslim insurgents.
The military junta eventually organized an election, which a Thaksin-friendly government won. During an anti-government protest, a lady died in an explosion, and many protestors lost limbs. There was some suspicion that the protestors were carrying IEDs which exploded prematurely. "Our team has used a GT200 substance detector and found no substance used in making bombs. We've already checked the clash scenes and the bodies and clothing of the injured victims," Pornthip Rojanasunand said. She concluded that police tear-gas grenades used by the police caused the injuries and death. Despite evidence to the contrary. The public trusted her and the forensic powers of the "bomb detectors," the Queen attended the funeral of the dead lady, and a military-appointed court soon replaced the elected government with one that supported the military.
Soon, evidence started accumulating the the "bomb detectors" weren't working in the South and civilians and low-level soldiers were dying as a result. Pornthip lended her public credibility to the devices. "Personally, I have never handled the device myself. But my people have used it and it is accurate every time. Long long time ago, people believed that the Earth is flat and anyone who said otherwise faced execution. Things which are not visible does not necessarily mean they do not exist. The devices are there and no one has the right to ban their use. I will continue to use it."
The basic detector costs about $20,000, but additional "sensor cards" can be bought to "detect" things like dead bodies. The military-leaning government later killed many protestors in a large protest a few years ago. There were rumors that even more were killed and their bodies placed in containers and sunk off the coast. When containers was found sunk off the coast, Pornthip put a dead-body sensor card into her "bomb detector" and concluded that the containers didn't have dead bodies. Therefore, it wouldn't be cost effective to actually open one of the containers up to check and see.
In conclusion, people like Pornthip support such non-sense "bomb detectors" - not because they personally have to use them - but because they or people they have a vested interest in have supported the frauds in the past, and suddenly recanting and saying that they don't actually work would cause them to lose face.