Newbie with a private loan question

[Kyle Dutson]

I was just curious if anyone could clarify something for me. Hypothetical, say I want to buy an income property but have no to little money.  I have searched out another investor to help me but this investor wants to do a debt investment and not an equity partnership. I come up with enough money for the down payment on the property via the private loan. How do I secure this loan for this investor? The mortgage lender (bank, or seller) would hold the 1st deed of trust if I am not mistaken. What form of security would the private lender have? A second deed? Excuse my ignorance