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We report the discovery of a new metal-rich DAZ white dwarf, GD 362. Highsignal-to-noise optical spectroscopy reveals the presence of spectral linesfrom hydrogen as well as CaI, CaII, MgI, and FeI. A detailed model atmosphereanalysis of this star yields an effective temperature of Teff = 9740 +/- 50 K,a surface gravity of log g = 9.12 +/- 0.07, and photospheric abundances of logCa/H = -5.2 +/- 0.1, log Mg/H = -4.8 +/- 0.1, and log Fe/H = -4.5 +/- 0.1.White dwarf cooling models are used to derive a mass of 1.24 Mo for GD 362,making it the most massive and metal-rich DAZ uncovered to date. The problemsrelated to the presence of such large metal abundances in a nearby (d ~ 25 pc)white dwarf in terms of an accretion scenario are briefly discussed.Comment: 11 pages, 3 figures, accepted for publication in the ApJ Letter

Discovery of a Cool, Massive, and Metal-rich DAZ White Dwarf