A third suspect, Zarumin Coleman, 21, faces charges of conspiracy to commit robbery and assisting a criminal. He was arrested Thursday after a SWAT team swept an Indianapolis apartment building.
Jasper Frazier, 36, was charged with attempt to commit robbery and conspiracy to commit robbery. He turned himself in to police in Ohio on Thursday, authorities said.
All four suspects are from Indianapolis, police Lt. Jeff Duhamell said.
"We think we got the primary people that were involved in the homicide," he said, adding that investigators are not releasing a motive behind the killings.
Friends Andrea Yarrell and Gina Hunt, both 24, and their children, ages 4 months and 23 months, were all shot repeatedly late Monday in their home in an attack that sparked outrage in the city.
Police said Yarrell, her 4-month-old daughter Charlii, Hunt and her 23-month-old son, Jordan, were shot multiple times in the face and torso.
"To the ones that did this, I hope there is no peace," Marion County Sheriff Frank Anderson said.
Two handguns were found within a block of the house, where the victims lived. A set of scales, several weapons, a safe and one pound of what was believed to be marijuana were found in the house, police said.
The four men were being held in jail. Duhamell said he expects formal charges to be filed by Tuesday.
Hundreds of mourners packed an Indianapolis church Saturday for the funeral of Hunt and her son. Juan Geralds, a relative of the Hunt family, said it was time to end the cycle of parents burying their children.
"Stop this foolishness," he said.
