As the city of Stockton mourns the four people killed at a child's birthday party over the Thanksgiving holiday weekend, little is known about the suspect or suspects responsible.

Investigators have not released a description of the shooter or information about a potential motive for the attack, which claimed the lives of three children and one adult and left 11 others injured. Days after the deadly hail of gunfire broke out at a banquet hall where as many as 150 people were gathered, it's still not clear how many people were involved in the shooting.

Though tips have already begun pouring in, law enforcement officials have pleaded with the public for more information.

"We need everyone who has any information on this to reach out to us," San Joaquin County Sheriff Patrick Withrow said at a news conference on Sunday, Nov. 30. "This is the time for our community to show that we will not put up with this type of behavior where people will just walk in and kill children."

Here's what we know - and what we don't - about the suspect.