Missing 5 Chest Keys + location of final chest for Melissa and Kimberly

[Keaton]

I'm stuck at 96% and the only hints I get out of the NPCs are:
"Metal vases can be broken if you're strong enough. I sold a metal vase to the police force long ago"
"Once, a rat stole my house key and I found it in a wall"
"Its a felony to use phones at the police station. What kind of ♥♥♥♥♥♥♥♥ is that?"
"I saw someone at the police station whose pants kept falling down"
For the last one, I know I need to enter the safe for the belt buckle, but it says I don't have the right tool for the job, even though guides tell me I need a lockpick from the Ray farm that I got ages ago, and I've since upgraded to an unbreakable lockpick.

I haven't gotten a hint about it, but when I go to the Casula Forest creek end, I see a mouse running down into the bushes. A guide told me there is a key there, but even though I know the location, I can't find it down there.

Any help would be appreciated!

[Keaton]

I saw someone mention that the mouse at the creek end is probably bugged, and I found a key I needed after seeing someone mention a maze clue, so I went below Jon's warehouse and found an arrow there that led me to the key. But now the NPCs are giving a new clue:
"You ever wonder wonder what lies up in the rafters of tall gymnasiums? I tried to find out by burrowing a hole in the wall upstairs but then I got expelled from school for vandalism"

[Kilroy]

For five keys I'll point you to my guide. There are way too many keys in walls with rats to pick which one it might be. Download the PDF and search for "Chest Key". For the Chests search for "Kama Sutra Melissa" and "Kama Sutra Kimberly" to see where all five of their chests are. There is no real "position" for the chests.

I'm at a loss about the Safe in the police station as I always picked it up early.

The there are two locker keys on the climbing wall at the Gym. Don't recall the contents of the lockers they open, but they don't contain a chest key.

There is a chest key on the back board in the Police Gym.

https://steamcommunity.com/sharedfiles/filedetails/?id=3244678192

[Keaton]

Hmmm... I already have the key from the back board, I think
you mean where you throw the ball, right? or is there another key nearby?
I tried looking at your guide, and it helped me find one of the chests I need in the church!
I still need 4 more keys so I can actually open those chests, though
I know one of the keys is related to the beltbuckle, but no idea where the other ones are
I'm not sure if its key-related, but now I'm getting a clue where the NPC says:
"never shoot at electrical outlets. you could cause a fire"
and I can't find any more metal vases in the police station. are they referring to a different place?
"Metal vases can be broken if you're strong enough. I sold a metal vase to the police force long ago"

Ah, I accidentally shot the outlet in the gun firing range and it started a fire in the police bathroom which gave me a key! so only 3 more to go now!
And the gymnasium clue is referring to the final Melissa chest which is hidden inside the wall in the second floor of the police station. you can see the edge of the chest from the gym.

[Kilroy]

There is just the one key on the back board in the gym

The electrical outlet is in the gun range and it starts a fire in the men's locker room. Putting out the fire gives you a key.

Maybe in the wall in the commissioner's office, right wall?

Honestly, searching the guild for "Chest Key" is probably the best way to find a missing key.

[Keaton]

I found the rat ones. There were two keys in Judy's old apartment each located where the rat was running back and forth when you had to catch one to feed to Simon. I'm now stuck on 99% because I can't open the safe in the lobby of the police station, so I'm at a loss at what to do.