According to the report, the victim was sitting on his walker in the 12800 block of Southwest 8th Street around 2 a.m. Monday when he was approached by Serna, who grabbed a garbage can lid and started hitting the man multiple times, knocking him to the ground.
…
While the victim was on the ground, Serna grabbed the walker and hit the man on the head with it twice, before hitting him with a racket, the report said.

Serna rifled through the victim’s pockets and stole his wallet, then demanded the victim’s PIN to his food stamp card, the report said. The victim gave Serna the wrong number, and Serna fled the scene, the report said.

Man Accused of Robbing, Beating Elderly Man With Walker in SW Miami-Dade

We were just talking about enhanced penalties for crimes of violence against the elderly and this one just happened to pop yesterday. And no, the guy is not sick or mental, he simply does not have the same morals we do. He is a criminal with his own life guidelines and they do not include being fair or treating the elderly with respect. But don’t trust me, go to 1:56 and listen what he has to say.

Here is the booking info:

Case(s) Information
Case Number: F20002438 Desc: STANDARD BOND Bond: $ 35000 **
Comment Case: PC FOUND CT1-2 10K EACH CT3 15K
Charge: ROBBERY/ ARMED/ WEAPON
Charge: BATTERY/ AGGRAVATED/ GREAT BODILY HARM/ WEAPON
Charge: BATTERY/ AGGRAVATED/ ON PERSON 65 OR OLDER
Bond Information
Charge Satisfied: No
Bond Submitted:
** Bond information posted on this case/charge may not reflect the current amount. Call the detention facility for updated information.

Amazingly, he shows no felony time in Florida. No idea on other arrests.