Tucson, AZ - For attorneys who rely on expert testimony to carry the weight of a case, the moment of cross-examination can determine everything. David J. Leonard, Expert Witness in the states of Arizona and California, has spent more than 60 years preparing for exactly that moment — and his track record under aggressive questioning has become one of the most compelling reasons attorneys seek out his services.
kA DEJ=6lQE6IE\2=:8?i ;FDE:7JjQmrC@DD\6I2>:?2E:@? 3J D<:==65 @AA@D:?8 4@F?D6= :D H96C6 >2?J 6IA6CE H:E?6DD6D 72=E6C] s2G:5 y] {6@?2C5[ 2 =625:?8 k2 C6=lQ?@7@==@HQ 9C67lQ9EEADi^^HHH]23?6HDH:C6]4@>^AC6DDC6=62D6D^:?DFC2?46\325\72:E9\6IA6CE\H:E?6DD\:?\2C:K@?2\2?5\42=:7@C?:2\>2C<D\D:I\564256D\@7\=682=\>2=AC24E:46\2?5\325\72:E9\H@C<0g_bb_e]9E>=Qm4:G:= =:E:82E:@? 6IA6CE H:E?6DD :? pC:K@?2 2?5 r2=:7@C?:2k^2m[ 92D 366? 56A@D65 3J D@>6 @7 E96 D92CA6DE =:E:82E@CD :? E96 4@F?ECJ 2?5 F?56CDE2?5D AC64:D6=J H92E :E E2<6D E@ C6>2:? DE625J] w6 C6D:DED D4C2>3=:?8[ <66AD 2?DH6CD 5:D4:A=:?65[ 2?5 2?E:4:A2E6D C67FE2E:@?D @7 25G6CD6 6IA6CE E6DE:>@?J 367@C6 E96J 2C:D6] pEE@C?6JD H9@ 92G6 H@C<65 H:E9 {6@?2C5 ?@E6 E92E 96 :D 6I46AE:@?2==J 5:77:4F=E E@ D92<6 — 2?5 E92E 96 :D 24FE6=J 2H2C6 @7 9@H 9:D 56>62?@C 2?5 C6DA@?D6D C68:DE6C H:E9 2 ;FCJ]k^Am
kA DEJ=6lQE6IE\2=:8?i ;FDE:7JjQm%92E 4@>A@DFC6 @? E96 DE2?5 :D >2E4965 3J C:8@C@FD AC6\E6DE:>@?J AC6A2C2E:@?] pD 2 E@A k2 C6=lQ?@7@==@HQ 9C67lQ9EEADi^^D92C6]8@@8=6^"at"=Fw{gIyI"Ih`BQmEC:2= 6IA6CE H:E?6DD :? pC:K@?2 2?5 r2=:7@C?:2k^2m[ {6@?2C5 E2<6D 2 DECF4EFC65 2AAC@249 E@ 6G6CJ 2DD:8?>6?Ei 23D@C3:?8 4@>A=6I 724EF2= C64@C5D BF:4<=J[ 5:DE:?8F:D9:?8 4C65:3=6 2==682E:@?D 7C@> E9@D6 F?DFAA@CE65 3J 5@4F>6?E2CJ 6G:56?46[ 2?5 4C27E:?8 @A:?:@?D E92E 9@=5 7:C> 6G6? H96? @AA@D:?8 4@F?D6= AFD96D 92C5 H:E9 F?7@F?565 9JA@E96E:42=D] Qx C6D:DE D4C2>3=:?8[Q {6@?2C5 D2JD] Qx <?@H 9@H :E =@@<D H96? 2? 6IA6CE 86ED C2EE=65[ 2?5 x >2<6 DFC6 E92E ?6G6C 92AA6?D]Qk^Am
kA DEJ=6lQE6IE\2=:8?i ;FDE:7JjQm{6@?2C5VD 23:=:EJ E@ >2:?E2:? 4=62C[ AC:?4:A=65 A@D:E:@?D :D A2CE:4F=2C=J G2=F23=6 :? >2=AC24E:46 >2EE6CD] pD 2 ECFDE65 k2 C6=lQ?@7@==@HQ 9C67lQ9EEADi^^HHH]8@@8=6]4@>^>2AD^A=246^s2G:5Zy]Z{6@?2C5[Z!{rZTfrZtIA6CEZ(:E?6DDZ:?ZpC:K@?2^oba]`d_beh[\``_]fdh`ebb[ha`>^52E2lPb>aP`6bPc3`Pc>hP`>aPa>`P`D>2=AC24E:46Z6IA6CEZH:E?6DDZ:?ZpC:K@?2Z2?5Zr2=:7@C?:2Pb>dP`D_Ige5eefh3`_ggehc7i_Iebeb4hd4_a4d5bebPg>aPb5ba]`d_beh`Pc5\``_]fdcahacP`eDTau8Tau``IJCK`;E=n6?ECJlEEFU2>Aj806Alt8@J|sxa|s&I}JcHxz)|s$@p$pu"pHTbsTbsQm>2=AC24E:46 6IA6CE H:E?6DD :? pC:K@?2 2?5 r2=:7@C?:2k^2m[ 96 F?56CDE2?5D E92E ;FC:6D ?665 E@ D66 4@?D:DE6?4J 2?5 4@?7:56?46[ ?@E 96D:E2E:@?[ 7C@> E96 H:E?6DD DE2?5]k^Am
kA DEJ=6lQE6IE\2=:8?i ;FDE:7JjQmpEE@C?6JD D66<:?8 2 E@A k2 C6=lQ?@7@==@HQ 9C67lQ9EEADi^^HHH]8@@8=6]4@>^>2AD^A=246^s2G:5Zy]Z{6@?2C5[Z!{rZTfrZtIA6CEZ(:E?6DDZ:?ZpC:K@?2^oba]`d_beh[\``_]fdh`ebb[ha`>^52E2lPb>aP`6bPc3`Pc>hP`>aPa>`P`D6IA6CEZH:E?6DDZ7@CZ=682=Z>2=AC24E:46Z:?ZpC:K@?2Z@CZr2=:7@C?:2Pb>dP`D_Ige5eefh3`_ggehc7i_Iebeb4hd4_a4d5bebPg>aPb5ba]`d_beh`Pc5\``_]fdcahacP`eDTau8Tau``IJCK`;E=n6?ECJlEEFU2>Aj806Alt8@J|sxa|s&I}JcHxz)|s$@p$pu"pHTbsTbsQm6IA6CE H:E?6DD 7@C =682= >2=AC24E:46 :? pC:K@?2 @C r2=:7@C?:2k^2m H9@ 3C:?8D 3@E9 4@FCEC@@> 4@>A@DFC6 2?5 2?2=JE:42= AC64:D:@? E@ 6G6CJ 42D6 2C6 6?4@FC2865 E@ 4@?E24E s2G:5 y] {6@?2C5] {6@?2C5 2446AED 2DD:8?>6?ED :? %F4D@?[ !9@6?:I[ 24C@DD pC:K@?2[ 2?5 :? @E96C DE2E6D[ H:E9 +@@> 2AA62C2?46D 2G2:=23=6]k^Am
kA DEJ=6lQE6IE\2=:8?i ;FDE:7JjQmr2== Z` Wda_X eaa\ffbf @C G:D:E k2 C6=lQ?@7@==@HQ 9C67lQ9EEADi^^52G:5;=6@?2C5=2H]4@>^Qm9EEADi^^52G:5;=6@?2C5=2H]4@>^k^2m E@ 86E DE2CE65]k^Am
kAmkDA2? DEJ=6lQ7@?E\D:K6i`gAI P:>A@CE2?EjQm|65:2 r@?E24Ek^DA2?mk^Am
kAmkDEC@?8mr@>A2?J }2>6ik^DEC@?8m k2 9C67lQ9EEADi^^HHH]23?6HDH:C6]4@>^4@>A2?J?2>6^52G:5;=6@?2C5=2H]4@>0`eg```]9E>=Q C6=lQ?@7@==@HQms2G:5 y] {6@?2C5[ !{r M tIA6CE H:E?6DD :? pC:K@?2k^2mk^Am
kAmkDEC@?8mr@?E24E !6CD@?ik^DEC@?8m |65:2 #6=2E:@?Dk^Am
kAmkDEC@?8mt>2:=ik^DEC@?8m k2 9C67lQ9EEADi^^HHH]23?6HDH:C6]4@>^6>2:=04@?E24E0FD]A9AnACl4:G:=\=:E:82E:@?\6IA6CE\H:E?6DD\:?\2C:K@?2\2?5\42=:7@C?:2\D92C6D\H9J\4C@DD6I2>:?2E:@?\C625:?6DD\:D\2\<6J\724E@C\:?\42D6\@FE4@>6DQ C6=lQ?@7@==@HQm$6?5 t>2:=k^2mk^Am
kAmkDEC@?8m!9@?6ik^DEC@?8m Z` WbabX bdh\__gck^Am
kAmkDEC@?8mp55C6DDik^DEC@?8mdddd |6=A@>6?6 (2Jk^Am
kAmkDEC@?8mr:EJik^DEC@?8m %F4D@?k^Am
kAmkDEC@?8m$E2E6ik^DEC@?8m pC:K@?2 gdfcfk^Am
kAmkDEC@?8mr@F?ECJik^DEC@?8m &?:E65 $E2E6Dk^Am
kAmkDEC@?8m(63D:E6ik^DEC@?8m k2 9C67lQ9EEADi^^52G:5;=6@?2C5=2H]4@>^Q E2C86ElQ03=2?<Q C6=lQ?@7@==@HQm9EEADi^^52G:5;=6@?2C5=2H]4@>^k^2mk^Am
kAm k^Am
kAm!C6DD #6=62D6 s:DEC:3FE65 3J k2 9C67lQ9EEADi^^HHH]23?6HDH:C6]4@>Qmpq}6HDH:C6]4@>k^2mk^Am
kAm%@ G:6H E96 @C:8:?2= G6CD:@? @? pq}6HDH:C6 G:D:Ei k2 9C67lQ9EEADi^^HHH]23?6HDH:C6]4@>^AC6DDC6=62D6D^4:G:=\=:E:82E:@?\6IA6CE\H:E?6DD\:?\2C:K@?2\2?5\42=:7@C?:2\D92C6D\H9J\4C@DD6I2>:?2E:@?\C625:?6DD\:D\2\<6J\724E@C\:?\42D6\@FE4@>6D0g`cg__]9E>=Qmr:G:= {:E:82E:@? tIA6CE (:E?6DD :? pC:K@?2 2?5 r2=:7@C?:2 $92C6D (9J rC@DD\tI2>:?2E:@? #625:?6DD xD 2 z6J u24E@C :? r2D6 ~FE4@>6Dk^2mk^Am
kAmk:>8 DC4lQ9EEADi^^HHH]23?6HDH:C6]4@>^AC6DD0DE2E]A9AnACl4:G:=\=:E:82E:@?\6IA6CE\H:E?6DD\:?\2C:K@?2\2?5\42=:7@C?:2\D92C6D\H9J\4C@DD6I2>:?2E:@?\C625:?6DD\:D\2\<6J\724E@C\:?\42D6\@FE4@>6DQ 2=ElQQ H:5E9lQ`AIQ 96:89ElQ`AIQ ^mk^Am
