Even the company that makes the stun gun, Taser International, urges caution about use of the weapon in the "drive-stun" mode and with repeated shocks — uses that The Post survey found have been frequent on the streets of Palm Beach County and the Treasure Coast.
When the two barbed prongs that Tasers shoot are ensnared in skin or clothing, they transmit 50,000 volts of current that override the nervous system and temporarily paralyze muscles. The greater the distance between the prongs, the more incapacitating the effect. Another five-second jolt can be administered by pulling the trigger again as long as the suspect hasn't ripped out one of the prongs.
Officers also can remove the prong cartridge and discharge the weapon directly against a person's body in the "drive-stun" mode to subdue combative arrestees with a searing jolt of pain.
The Taser training manual advises that because it is not incapacitating, this mode can lead to "prolonged struggles" and that "it is in these types of scenarios that officers are often facing accusations of excessive force."
The technique also requires some care, according to Taser International, but the company's guidelines contain conflicting recommendations. The manual points out that the neck and groin "have proven highly sensitive to injury, such as crushing to the trachea or testicles if applied forcefully." The manual continues, "However, these areas have proven highly effective targets."
A recent amendment to the DeLand Police Department's Taser policy is clearer, saying that the "drive-stun" mode can be used only under exceptional circumstances. Local policies don't address the use of the "drive-stun" mode in writing, although narratives in some of the reports examined by The Post acknowledge that this use is discouraged.