[Scoutmaster]

Did they do any toxicology tests on Zimmerman? I’m told that’s standard procedure in a shooting. I haven’t seen anything saying that they did.

For what it's worth, this source says the police took a blood sample from Zimmerman (under the subheading "The Injuries and the Paramedics", more than halfway down the article):

A Police Dept. spokesperson told local Orlando media a full toxicology analysis was completed including, blood tests, breathalyzer and the police took residue and swab samples of his hands, arms and body.

[Scoutmaster]

fail. Here's the link: Blood test on Zimmerman under subheading The Injuries and the Paramedics.