How about releasing it at 8:30 AM when the ferals are still asleep and the police have daylight hours to prepare.
Around here the ferals won't even wake up for "breckfuss" until 11 AM.
At noon, they lumber around outside in their pajamas.
At 2PM "dey wake" and dressed (ok some females are still in PJs and fluffy shoes).
At 3PM they have to get to daycare, and if lucky, "gummint" daycare (AKA pubric sckrewl) will drop them off after feeding the "chillruns" walking welfare bonus.
At 5PM, the MSM is on and will let them know that "dey been dissed".
By 6PM "dey mad".
By 7PM, when the sun goes down, the vampires come out.
By 8PM they start to become predators....all the way until near dawn.
Good luck folks in St. Louis. Hope you are armed, ready, and have your head on a swivel. Get a GMS/FRMS/2m/440Mhz ham radio you can use secondary/tertiary comms with your family members.
Be prepared for social media to allow packs of savages and white, liberal, communist agitators to be mobile and set up ambushes in "non-black" areas. If you are in a black neighborhood, like me, be prepared for near-instant mobs, or the "sudden sofa thrown in front of your vehicle" type of ambush. Have a plan. Have backup plans. Above all: be armed!
Pack a semi-auto or shotty in the van, and a 3 day bug out bag. Remember, it takes 100 hours for the "gummint" to form up, organize, and start to push back. You are on your own until then.
That actually makes a lot more sense, seriously