The heavy metal-loving governor of Indonesian capitalJakartahas surrendered a guitar that was a gift fromUSband Metallica to anti-corruption authorities, an official said Tuesday.

A beaming Joko Widodo appeared on TV last week strumming the maroon bass guitar gifted to him by Metallica’s Robert Trujillo, which was autographed and bore the words “Giving Back!.. Keep Playin’ That Cool Funky Bass!”.

But the powerful Corruption Eradication Commission (KPK) said that Widodo, widely considered clean in a notoriously graft-ridden country, had now handed the gift to them.

“We will check if there is any conflict of interest or if there was an exchange of favours,” commission spokesman Johan Budi told AFP “The screening process takes up to 30 days, and after that we will decide whether to return the guitar to him or confiscate it.”

During the TV appearance Widodo, an anti-establishment figure who was elected in September, said he was a huge fan of Metallica, whose hits include “Enter Sandman” and “Nothing Else Matters”.

He also listed Led Zeppelin, Deep Purple and Napalm Death as among his favourite bands.