Websep 24, 2015 · this week, in a tragedy as horrific as any the couple investigated, mark allegedly killed debby, another man and himself as the chaotic personal life of the. Websep 24, 2015 · mark and debby constantino, a couple featured in episodes of the travel channel's paranormal investigation series ghost adventures, were found dead on. The bodies of a man and woman found in a barricaded apartment by police investigating an earlier reno homicide were an estranged husband. Websep 24, 2015 · mark and debby constantino, who were…