Brown Car Timeline

[Druzer]

I agree that if the caller referred to the public park as "Blue Rock Springs" it would give the impression that he was local, however I am not certain that this is the impression the caller wanted to leave with the police.

[Richard Grinell]

We also have to consider that the Zodiac Killer had two days from Stine murder to October 13th 1969 letter, so if we applied this failure to mention locations by name across the board, we would have to contend he didn't know Presidio Heights & Presidio Park because he used the wording "The S.F. Police could have caught me last night if they had searched the park properly". It can be argued that Columbus Parkway is more specific than Blue Rock Springs Park, as this is an individual road not a vast expanse of land.

[CuriousCat]

We also have to consider that the Zodiac Killer had two days from Stine murder to October 13th 1969 letter, so if we applied this failure to mention locations by name across the board, we would have to contend he didn't know Presidio Heights & Presidio Park because he used the wording "The S.F. Police could have caught me last night if they had searched the park properly". It can be argued that Columbus Parkway is more specific than Blue Rock Springs Park, as this is an individual road not a vast expanse of land.

Well, it could be that he knew the area well enough that he specifically said "public park" because he saw that area of BRS as a public park, opposed to the lake, swimming area and also to differentiate the location from the golf course across the street and also named BRS if I am not mistaken. That would seem to indicate someone who knew the area well.

He wasn't good, for whatever reason, at describing the scenes of his attacks, such as saying "North Bay area" instead of each town/locale. He also wasn't very good at distance, as the "one mile" doesn't really work either way you go, and he was also off on the mileage from the ranger station to the LB site.

I have no idea what he actually meant during the BRS phone call but the "one mile east" fits better coming from the north for me.

[Marshall]

Well, it could be that he knew the area well enough that he specifically said "public park" because he saw that area of BRS as a public park, opposed to the lake, swimming area and also to differentiate the location from the golf course across the street and also named BRS if I am not mistaken. That would seem to indicate someone who knew the area well.

He wasn't good, for whatever reason, at describing the scenes of his attacks, such as saying "North Bay area" instead of each town/locale. He also wasn't very good at distance, as the "one mile" doesn't really work either way you go, and he was also off on the mileage from the ranger station to the LB site.

I have no idea what he actually meant during the BRS phone call but the "one mile east" fits better coming from the north for me.

He also wasn't good at describing dates of his crimes, such as Christmas (actually Decemer 20) and 4th of July (actually just past midnight, July 5.) Except at LB where he was precise down to the minute.

I think the obfuscation Richard details is likely, and important to Z because of something Z didn't know when he made the phone call, but did when he wrote his letter. That being, MM would survive, and describe him pull into the park earlier, leave at high speed, and then return not long after. This, too could indicate not only familiarity with the area (Z is going somewhere specific before shooting his victims) but possibly even more specifically - Z was going home to get his gun and ammo.