From our investigator Jim Gentry:
For an investigator that has an iPhone or iPod and not a lot of money for a professional recording device, why not turn your iPhone into a Tascam DR series recorder! Two condenser mics are adjustable to 180 degrees and you can download the free Tascam app to give it that Tascam interface look that all of their recorders have. Plus, why not record high definition video with your iPhone while you record high quality stereo with your phone or iPods HD recording features! Currently, you can buy these for the unheard of price of $29 each. These normally retail for $80 each of higher! B&H Photo Video Pro Audio currently is the only place offering them for sale at this ridiculous price. Only on sale for a very limited time.

Here is the link to the manufacturer's site for this product so you can see pics and product specs:

http://tascam.com/product/im2/