On 17 May 1971, Veronica's advertising director Norbert Jurgens was arrested and the following day, Veronica's director Bull Verweij was also arrested. In a television interview, Verweij claimed he had paid a man to tow the Mebo II into Dutch waters so that the ship would be seized. Verweij denied any intention of endangering the lives of RNI's crew but was found guilty together with Jurgens and the crew of the dinghy. All five were sentenced to a year in prison. The damage to Veronica's reputation was incalculable, and just as the 1966 Radio City shooting had motivated the British government to pass anti-pirate legislation, the RNI fire similarly motivated the Dutch. Both Veronica and RNI continued to broadcast without further incident, but as the Government began to draw up plans for anti-pirate legislation, the two stations began to campaign against it. In September 1972, the two radio ships were joined by Radio Caroline's , which anchored between the Norderney and Mebo II. Frequency change and RNI2 Veronica had been experiencing interference on 1562 kHz (192 m) from the Beromünster transmitter in Switzerland. Originally allocated 10 kW on that frequency, Beromünster had upgraded to 160 kW and was planning 300 kW. Veronica had been considering a new frequency since the late 1960s, and the threat of increased interference made a change imperative. At noon on 30 September 1972, Veronica broadcast a half-hour retrospective documentary. The station then closed at 12:30 pm, a time chosen to symbolise the station's 12½ years on the air, announcing it would reopen at 1:00 pm on its new frequency of 557 kHz (538 m). A moment after Veronica went off the air, listeners heard RNI's theme tune on 1562 kHz. RNI DJ Tony Allan, in Dutch, thanked Veronica for its 12½ years of broadcasting and reminded listeners of Veronica's new frequency, then welcomed them to the new sound of "RNI 2". RNI's management claimed the new service had been launched to prove that RNI could broadcast additional frequencies in case of emergency, but it was widely seen by listeners as a tongue-in-cheek rivalry aimed at poaching Veronica's listeners. Veronica returned to the air on 557 kHz as scheduled, and listeners in the Netherlands and Belgium reported improved reception. On the same day, the Mi Amigo began test transmissions in preparation for Radio Caroline's return. RNI 2 broadcast for a few days and then went off