Eyewitness account:

Dianne Bawit, a 21-year-old student at California State University San Marcos, said she had been shopping for bottled water when she saw a man, who she later learned was the police officer, falling to the ground. She said he had appeared to be in distress.

“He fell pretty hard because I heard a pretty big thump on the ground,” Ms. Bawit said. “He looked like he had a heart attack.”

Ms. Bawit said she initially went to help the officer, but retreated as the altercation escalated.

“He stood up by himself. He pulled out his handgun and starts triggering five to seven shots,” Ms. Bawit said, adding that she was within 10 feet of the men and then took cover.

[link to www.nytimes.com (secure)]

No mention of the shooter holding a baby. But it does sound like he was pushed or thrown violently to the ground.