I can imagine (tho would rather not) that it wouldn’t be very easy for the victim to clearly identify what the weapon was during the attack. 30cm steel rulers are sold by car parts merchandisers so assume they are a tool of the trade.
Am-Tech 2pc Steel Rule Set | Euro Car Parts
We already know that he likes to use car related items for dual purpose from his repurposing of the work bench and tow bar, as well as actual cars. Some kind of fetish that’s a new one to me?!
And if cars are some kind of theme, is this also why they was interest in locating vehicles used at the time? Only just had these thoughts, just throwing them out there while we wait for more news.
We know, and therefore so do German LE, that he had use of other vehicles at the time, just speculating why the Jag and VW camper were identified as so important?