They found the bodies inside the home and a medic pronounced all four dead.
The suspects' names were not released when Troy police made the announcement at 2 a.m. Saturday.
Symes says Myers' older son has been living with her for about two months.
"My sister was supposed to be with me and her children, all three of them, for Christmas, and I got robbed of that", said Shakera Symes.
The victims - Brandi Mells, 22, Shanta Myers, 36, and Myers' children Shanise, 5, and Jeremiah, 11 - were found dead in a basement apartment on Tuesday in what police called a "horrific" homicide that shook the upstate NY city.
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Four people found dead on Boxing Day (26 December) in an upstate NY basement apartment have now been identified, and are thought to be victims of what police are describing as a quadruple homicide.
Myers also had a 15-year-old, Isaiah Smith, who was out of town on a retreat when the slayings unfolded in his Troy home.
A pastor says a woman and her two children among four people killed in an upstate NY basement apartment were much loved and respected in the neighborhood. Shanta Myers (Mother to both children), 36 years old.
"I don't have the word.""It's inconceivable", Robinson said. He says community members are nervous because the killer remains at large.
The New York Post reported that after the discovery of the crime shocked police in upstate New York.
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But Chief John Tedesco said Wednesday that the victims include a 36-year-old woman and her 22-year-old girlfriend, along with the 36-year-old woman's 5-year-old daughter and 11-year-old boy.
Authorities have released the names of two women and two children slain in their upstate NY apartment and police are asking the public for information.
"After being in this business for 42 years, I can't describe the savagery of a person who would do this", Tedesco said at the press conference.
A local church announced it would offer a $5,000 reward to anyone who has information which could help solve the case.
No suspects have been identified, but police believe the victims were targeted.
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