Officers arrived at the residence at 10:47 a.m. to find two people with non-life threatening injuries outside of the apartment complex near Center Parkway.
When they entered the residence, they found Antwan Forbes, 36, dead inside. Forbes' sister, Latish Forbes, says he was stabbed several times.
Latish Forbes told FOX40 that their cousin is currently a suspect, but the Sacramento Police Department has yet to confirm that allegation.
Both Antwan Forbes and his cousin were very well-liked, according to Forbes' sister, and she was unaware of any disputes between the two.
The two people found outside have been hospitalized.
There are no suspects at large in this isolated incident.
Stay with FOX40 News and FOX40.com as police continue their investigation.