RICHMOND, Calif. (KGO) -- A month ago, an 18-year-old from Richmond was killed by a Los Angeles police officer. On Tuesday, his family remembered him.

Leaning on each other, family and friends of 18-year-old Ricardo "Ricky" Ramirez held hands and prayed as they remembered the high school graduate. Ramirez's dream was to become a caregiver for people in need, following the footsteps of his mom and sister. "It's hard.

Knowing that I won't see him the next day, but I'm trying to get through it. I'm trying to be strong for my parents since I'm the oldest," said Larissa Ramirez, Ricardo Ramirez's sister. Ramirez's mom plays back and forth the last words her son said to her as she dropped him off at a friend's house before he went to LA on vacation.

"He said, 'I love you, momma. Momma, I love you.' That is definitely what I'm going to miss," said Renee Villalobos, Ricardo Ramirez's mom.

MORE: Vallejo police officer shoots, kills 22-year-old on his knees after mistaking hammer for gun, chief says This week, a month after a Los Angeles police officer shot and killed Ramirez, the police department released surveillance video of the moments leading up to the shooting on July 13. Ramirez and three others were in a silver Cadillac that caught the attention of an officer in the area. "Occupants of a silver Cadillac wearing ski masks involved in a possible dispute with the driver of another vehicle," described Capt.

Kelly Muniz with LAPD on a Youtube video . After both vehicles took off an.