Fortune-telling of riverside female corpse

I think the five cards of spades, the J of diamonds and the K of spades were left by the murderer on purpose for the following reasons. First, according to the information provided by the local police, the place where the body was found was not the first scene. Because it was not the first scene, there was a corpse removal. The killer couldn't have moved the body without finding these three cards. Second, the general murderer will choose a hidden place that is not easy to be found after killing, but the murderer does the opposite, indicating that the murderer is intentional. Thirdly, since it is possible that the murderer did it on purpose, it cannot be ruled out that these three playing cards were left by the murderer on purpose. I want to express my personal views on this:

First, it is possible that the killer is talking about the location of the crime. 5, J, K. My understanding is that 5 is what I mean. K, which means kill in English, means kill. J stands for location, Jinhua. It means I killed her in Jinhua.

Second, after more than ten days of vigorous investigation, there was no useful information at all, and there was no alarm. There are two situations. 1 indicates that the woman is a foreigner. Judging from her dress, she came here to make a living, and there was no one at home to accompany her. But the woman is a local or local neighbor, and her family knows about the victim, but for some reason she doesn't want to talk about it.