So you think you're a good detective? think you know how to solve the case and find the monster. Only problem you have is memory? All these perks confusing? Well fret no longer this simple guide will help you out. Remember the monster can switch colors but not perks.

Here are the list of lines that the investigator gives you.
Note some perks do not have a tag, this will be explained. 4 lists is the max you can have.

Fellow Investigator : Self explanatory; this guy is an instigator like you
Has a Medical Degree : This man is a Doctor, the pack on their back also gives them away
History of Violence: Soldier man, They also have a backpack
Smells like Garbage : This guy is a janitor, this one is helpful to see because if you know the monster doesn't trigger cams, anyone with this line is sus.
Strong Sense of Authority: This man is a Warden, if they don't have their stun stick anymore this is the only way to tell.
Smells Fresh: This spaceman is a new recruit, treat them well and show them the ways of the Company.
Cultist : This one doesn't have a line when their jug is on their leg, once they drink the space milk they will have 2 lines saying "Anomalous readings detected" and that they "only speaks gibberish"

This is second list of perks you can choose from out of the 4 perks you can have.

Oxygen Filter : No line for this one, Not a lot of benefits for the monster process of elimination can narrow it down
Welder : Doesn't have a tag, but if the monster keeps his welder its a yellow tool usually on the back
Elastic Tendons : Springy Step, the monster will be able jump higher and move faster as a spaceman

These perks are the defense perks, only one has a line the rest have visual equipment you can track

A Strong Immune system: This is the anti-bodies perk, This a good monster perk to have as it lets you eat anyone without fear of using regen, it also saves you from a heath syringe.
Magnetic Boots : No line for this one but the spaceman will have metal boots on their feet
Blast Shield : This one doesnt have a line at the start but they have a big collar around their neck that wont go away until an explosion almost kills them. When the are saved from an explosion they will have a line stating that there is "explosive residue detected"

This is the final perk list, Two of these perks have lines for you to investigate

High Security Clearance: This is a VIP keycard, most spaceman have it, not many monsters do. This allows the person to have two keycards.
Increased Callusing on Knuckles : This is the fists perk, It helps the monster attack faster
Nimble : No line here, process of elimination is used here or the more dangerous method of see if the monster leaves footprints.

Remember a few things you can scan as a detective:

If someone is infected by a zombie or parasite it will let you know they have an infection
THEY ARE NOT THE MONSTER, I REPEAT THEY ARE NOT (The monster doesnt give this info)
Get them to a doctor or a heath station. If they die they can turn into a zombie or die from exploding.

You can scan heath stations to see who used them last, Ask the person who used it how he got injured, don't assume that an a refusal to answer is the monster

Security cams : if someone shoots a cam it will let you know the color. Remember the monster can shapeshift. Don't kill the person who shot it unless you're 100% Interrogate them find out if they are real or fake.

Power and Comms : The monster will turn these off, its your job to scan them to find out what color he did it as, Find out if its the monsters real color or a disguise.

Dead Bodies : Find out how they died and who done it. Use this to hunt murderers and monsters.

Doors : not a practical one but if the monster welds the door you can see what color welded the door or locked the door.

If anyone has other things they can scan please let me know in the comments

Good luck and remember, as a detective you are not a solo character, Stick with your fellow spaceman and give information, The more info you give the more of a threat you become to the monster. He will silence you. Find people you can trust. Good luck out there.