gave the cop handcuffs, and I think I gave the doctor medicine. That solved it. I'm really surprised the handcuffs didn't work for you...
I spent a LOT of time on that level with the star dangling down over the piranas. I play all my levels in the advanced mode for kicks, and towards the end, I always come up with outlandish solutions. First, I distracted the pirhanas away with a corpse, then placed a glacier in the water to keep the pirhanas away and to allow a place for the starite to fall and yet not fall into the water, so I wouldn't need a dolphin or anything to ride down to get it.
Also, in an alternate solution, I used a robot to distract the pirhanas. The robot shorted out as soon as it hit the water, and although the pirhanas kept attacking it, it proved indestructible.
