That's problematic as you could literally append that to any action and thus condemn it as illegal e.g. met to have some coffees and a chat ... with the intention to commit a violent crime.
The problem is that there's not necessarily any connection between the activity and the alleged violent crime - that's what needs to be proven such as highlighting specific signal conversations that were evidence of planning the crime.
Also, what is problematic about first aid kits? How is being in a "concealed" position problematic?