

CHEMICAL TESTS in DWI
Consent for tests needed: A person must
consent to the test (can't be forced unless
someone is seriously hurt from an accident,
or killed/threat of death).
1) Breath Tests: Breath tests are most
common in DWI's. Certain criteria are
required to make it admissible.
2) Blood Tests: Blood tests are the most
accurate testing, but are not as common at
breath. Again, certain steps are required to
make it a valid test. Often, because this type
test is less common, officers don't follow the
procedures required to obtain a valid result.
3) Urine Tests: Urine tests are the least
accurate. If the person has not urinated for a
couple hours, the urine that is tested may be
from a time-period that the person's level of
intoxication was much different than from
when the actual withdrawal of the specimen
is taken. The officer is supposed to have the
subject empty their bladder 15-20 minutes
prior to obtaining a sample. If this is not
done, the test should be successfully
challenged.

Law Office of Doug Goyen
15851 North Dallas Parkway #600
Addison, Texas 75001
Local: CALL NOW (972) 599 4100
Toll free: (877) 628 9610
Fax: (972) 599 7811
DWI Lawyer in the Dallas Forth Worth, North
Texas area
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