Mitsubishi FTO GPX MIVEC 2.0 V6 ENGINE none runner ?

Bent Valve On 1st Cyclinder, Pre Bent Valvewas an Excellent Runner And Only 10 Miles After Full Service And 3000 Miles Timing Belt Change. im presuming mechanic dropped something in 1st cylinder while changing plugs but cant prove it :o( These Engines Are Becoming Rare.