I do feel a lot of pity for Mageau as the Ferrin shooting was clearly a major constituent cause in his life going down the beep
Nevertheless, from what I recall of the Zodiac DVD interview with him, it's a lot of inarticulate rambling. You can make sense of it, but let's be honest, he's not what they would call in law enforcement "a reliable witness". He'd be made mincement out of if he ever made it to the stand in a criminal trial. So I don't really put much stock in his "testimony".

I don't recall what originally caused Gaikowski to pop as a potential suspect in the Zodiac killings but first hit detectives radar back in 1986. It just took 20 years for info. to arise and raise an eyebrow at him again.

But I think it's also related to the officer who rode with Darlene to the ambulance who's also named Richard that Graysmith claimed went to the painting party.

I noticed this aswell months/a year back. I posted it also on a Zodiac forum but it was deletedI guess they already knew this.

his interview seemed accurate for the most of it. The part where he mentions that name seems a little bit overthought by him, he raises his hands behind his back it seems weird and inconclusive cause he doesnt give any context to that revelation

Not on the DVD interview.

He has also said his name was Leigh.So.