I will discuss our image-stacking, galaxy monitoring method that has successfully detected 15 supernovae at z > 2 in the Canada-France-Hawaii Telescope Legacy Survey Deep fields. I will present supernova light curves and late-time Keck spectra which include two recently discovered super-luminous, pair-instability supernova candidates at z = 2.05 and z = 3.90. Our supernova program monitors z > 2 Lyman break galaxies. I will compare the rest-frame ultraviolet photometric and spectroscopic properties of the supernova host galaxies with respect to the complete (~100,000) galaxy sample and discuss observed trends and implications. Because Population III stars are believed to exist down to z ~ 2, and clouds of pristine gas capable of forming Population III stars have been discovered at z ~ 3, our technique to detect z > 2 supernovae offers the first viable means to provide observational examples of the deaths of the first stars. Upcoming DES DECam, Hyper-SuprimeCam, and LSST surveys are poised to detect >50,000 supernovae at z ~ 2 - 6 that will fully characterize high redshift events and enable tight constraints on their progenitors and the form of the high-redshift IMF.