Three people are dead after a series of crimes on Tuesday that took place at a home in Reno and an apartment in Sparks.

It began when a woman returned to her home around 8:00am Tuesday, in the 2300 block of Escalera Court in North Reno, to find her male roommate dead. She called the Reno Police Department and also let them know that her other roommate, a woman, was missing and she was concerned for her safety.  

As police investigated the death, they also worked to locate the missing woman.  By pinging her cell phone, they found that she may be at the Courtside Gardens Apartments near 15th Street and Oddie Boulevard in Sparks.  When officers responded there, someone began shooting at them through the door. Through negotiations, they discovered that the missing woman was inside and that she was being held hostage by her estranged husband.  Sparks Police identify that man as 53-year-old Mark Constantino and say he’s the one who fired the shots at them and is suspected in the death at the north Reno home. 

Negotiators from Reno and Sparks Police along with the local FBI attempted for several hours to get Constantino to surrender. 
Around 1:30 p.m., Sparks Police said their SWAT team made entry into the home and found Constantino and his estranged wife, who they say he kidnapped from the Reno location, dead inside the unit.

Investigators say the apartment belonged to an adult child of the former couple.

Constantino was previously arrested on August 8, 2015 after an incident with his estranged wife.  At that time he was charged with Kidnapping, Domestic Violence and Domestic Violence by Strangulation.

The names of Constantino's estranged wife and the other man killed in the Reno home have not yet been released.

Sparks High School was placed on a precautionary code yellow lockdown during the incident.

Stay with Channel 2 News for the latest on this developing story and watch for a full report tonight on Channel 2 News.