ABC News affiliate, 23ABC News, are reporting that the shooter in Taft high school has been apprehended by police.
The station reported that students called the station from inside the school, whilst they were hiding.
More top news
The alligator, estimated to be 15ft-long, was filmed wandering around a golf course where it is said to be a "mascot".
Michael Jace faces a sentence of 40 years to life in prison for shooting dead his wife in front of their children.
The 33-year-old British actress will assume the lead role in Mary Poppins Returns, due for release in 2018.