Possible Clues:

• It's a little lousy so to make the old force so acid
• ___ acid
• That's just a little lousy - enough to make the old police acid
• A little lousy over the old force
• Acid used in fertilizers and explosives
• Strong acid
• Colourless highly corrosive acid
• Lousy old cops in a CID way
• Was this lousy old force all a CID matter?
• The lousy old police are enough to make one acid