Find yourself a Birkin-like bag to modify.
This is actually a bag I found in one of my discount store runs. It is all plastic so I guess PETA friendly unless you count the dinosaurs. No, I don't carry a purse. Just got it because I can make something out of it.
The plastic material is naturally translucent so you can illuminate it from behind.
You will also need:
Some purple fabric for the header.
Some yellow and black felt for trim. Yellow duct tape would just cheapen it.
A flashlight capable of megalumens of illumination. I got my mega-LED flashlight at our favorite import tools store Port-of-Call Parcels.
A length of 12 AWG normal household wire for the TASER probe. You don't want your wire overheating causing a hazard when all that juice is flowing through the wire to the perp. If you are a contractor, you might substitute with the nominal 14 AWG.
A retro red/pink phone handset capable of interfacing with a modern day communications device.
Some toggle switches to wire up the electronics.
Electronics to provide the flashing alarm and sound player circuit. I used an Adafruit Flora wearable Arduino board that I previously used for my TARDIS IKEA shopping bag
.CAUTION: Sewing is addictive. Soldering is addictive. Be safe and learn to use the associated tools responsibly.